Not Upgrading from Beta 12 to Beta 13

Hello!

I have the same problem.

-bash-4.2$ php flarum info                                                                                                                   
Flarum core 0.1.0-beta.12                                                                                                                    
PHP version: 7.1.28                                                                                                                          
Loaded extensions: Core, date, libxml, openssl, pcre, sqlite3, zlib, bz2, calendar, ctype, hash, fileinfo, filter, ftp, gettext, gmp, SPL, ic
onv, pcntl, session, standard, readline, Reflection, Phar, shmop, SimpleXML, sockets, mbstring, tokenizer, xml, mysqlnd, PDO, curl, dom, gd, 
json, exif, mcrypt, mysqli, pdo_mysql, soap, xmlrpc, ionCube Loader                                                                          
+---------------------+----------------+--------+                                                                                            
| Flarum Extensions   |                |        |                                                                                            
+---------------------+----------------+--------+                                                                                            
| ID                  | Version        | Commit |                                                                                            
+---------------------+----------------+--------+                                                                                            
| flarum-lang-english | v0.1.0-beta.12 |        |                                                                                            
| flarum-flags        | v0.1.0-beta.12 |        |                                                                                            
| flarum-likes        | v0.1.0-beta.12 |        |                                                                                            
| flarum-lock         | v0.1.0-beta.12 |        |                                                                                            
| flarum-markdown     | v0.1.0-beta.12 |        |                                                                                            
| flarum-mentions     | v0.1.0-beta.12 |        |                                                                                            
| flarum-sticky       | v0.1.0-beta.12 |        |                                                                                            
| flarum-suspend      | v0.1.0-beta.12 |        |                                                                                            
| flarum-bbcode       | v0.1.0-beta.12 |        |                                                                                            
+---------------------+----------------+--------+                                                                                            
Base URL: https://genir.ru                                                                                                                   
Installation path: /var/www/genir.ru                                                                                          
Debug mode: off                                         

When executing the update command, it issues this:

-bash-4.2$ composer update --prefer-dist --no-dev -a --with-all-dependencies                                                                 
Loading composer repositories with package information
Updating dependencies
Nothing to install or update                                                                                                                 
Package s9e/flarum-ext-autoimage is abandoned, you should avoid using it. Use fof/formatting instead.
Package wiwatsrt/flarum-ext-best-answer is abandoned, you should avoid using it. No replacement was suggested.
Generating optimized autoload files
Carbon 1 is deprecated, see how to migrate to Carbon 2.                                                                                      
https://carbon.nesbot.com/docs/#api-carbon-2                                                                                                 
    You can run './vendor/bin/upgrade-carbon' to get help in updating carbon and other frameworks and libraries that depend on it.

I followed the advice and ran the command ./vendor/bin/upgrade-carbon

Got the result:

Using version ^1.10 for composer/composer                                                                                                    
./composer.json has been updated                                                                                                             
Loading composer repositories with package information                                                                                       
Updating dependencies (including require-dev)                                                                                                
Package operations: 8 installs, 0 updates, 0 removals                                                                                        
  - Installing seld/phar-utils (1.1.1): Downloading (100%)                                                                                   
  - Installing seld/jsonlint (1.8.1): Downloading (100%)                                                                                     
  - Installing justinrainbow/json-schema (5.2.10): Downloading (100%)                                                                        
  - Installing composer/xdebug-handler (1.4.3): Downloading (100%)                                                                           
  - Installing composer/spdx-licenses (1.5.4): Downloading (100%)                                                                            
  - Installing composer/semver (1.5.1): Downloading (100%)                                                                                   
  - Installing composer/ca-bundle (1.2.7): Downloading (100%)                                                                                
  - Installing composer/composer (1.10.10): Downloading (100%)                                                                               
composer/composer suggests installing ext-zip (Enabling the zip extension allows you to unzip archives)                                      
Package s9e/flarum-ext-autoimage is abandoned, you should avoid using it. Use fof/formatting instead.                                        
Package wiwatsrt/flarum-ext-best-answer is abandoned, you should avoid using it. No replacement was suggested.                               
Writing lock file                                                                                                                            
Generating autoload files                                                                                                                    
5 packages you are using are looking for funding.                                                                                            
Use the `composer fund` command to find out more!                                                                                            
Do you want us to try the following upgrade:                                                                                                 
  - nesbot/carbon: ^2.0.0                                                                                                                    
[Y/N] y                                                                                                                                      
Loading composer repositories with package information                                                                                       
Updating dependencies (including require-dev)                                                                                                
Nothing to install or update                                                                                                                 
Package s9e/flarum-ext-autoimage is abandoned, you should avoid using it. Use fof/formatting instead.                                        
Package wiwatsrt/flarum-ext-best-answer is abandoned, you should avoid using it. No replacement was suggested.                               
Generating autoload files                                                                                                                    
5 packages you are using are looking for funding.                                                                                            
Use the `composer fund` command to find out more!                                                                                            
Loading composer repositories with package information                                                                                       
Updating dependencies (including require-dev)                                                                                                
Package operations: 0 installs, 0 updates, 8 removals                                                                                        
  - Removing seld/phar-utils (1.1.1)                                                                                                         
  - Removing seld/jsonlint (1.8.1)                                                                                                           
  - Removing justinrainbow/json-schema (5.2.10)                                                                                              
  - Removing composer/xdebug-handler (1.4.3)                                                                                                 
  - Removing composer/spdx-licenses (1.5.4)                                                                                                  
  - Removing composer/semver (1.5.1)                                                                                                         
  - Removing composer/composer (1.10.10)                                                                                                     
  - Removing composer/ca-bundle (1.2.7)                                                                                                      
Package s9e/flarum-ext-autoimage is abandoned, you should avoid using it. Use fof/formatting instead.                                        
Package wiwatsrt/flarum-ext-best-answer is abandoned, you should avoid using it. No replacement was suggested.                               
Writing lock file                                                                                                                            
Generating autoload files

-bash-4.2$ composer why-not flarum/core v0.1.0-beta.13                                                                                       
flarum/core    v0.1.0-beta.13  requires          php (>=7.2 but 7.1.28 is installed)                                                         
flarum/core    v0.1.0-beta.13  requires          wikimedia/less.php (^3.0)                                                                   
flarum/flarum  -               does not require  wikimedia/less.php (but v2.0.0 is installed)

What am I doing wrong?

Aleram The most major issue is that your using PHP 7.1 as of Beta.13 we require PHP 7.2 as the minimum standard (although we would actually recommend php 7.3 or 7.4) further you should remove the extensions listed as abandoned using:

composer remove s9e/flarum-ext-autoimage
composer remove wiwatsrt/flarum-ext-best-answer

luceos tankerkiller125
In general, the PHP version is installed 7.3.4

-bash-4.2$ /opt/php73/bin/php -v
PHP 7.3.4 (cli) (built: Apr 9 2019 12:37:40) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.4, Copyright (c) 1998-2018 Zend Technologies

I will sort this out. Thanks for the direction

UPD
After the forced change of the PHP, the update was successful.
Thanks again for your help!