I just looked in the log in /storage/logs
Yes as you write, there is a log from 3am, it must be somewhere on the hosting side. Because yesterday the site went up without a problem.
I wonder if it was caused by a bad email setting in the administration.
Similar problem as here: https://discuss.flarum.org/d/24478-amazon-ses-smtp-issues
But I can't fix it because I can't connect to the administration
[2021-06-07 03:31:01] flarum.ERROR: Swift_TransportException: Connection could not be established with host myhosting.com :stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages:
error:1408F10B:SSL routines:ssl3_get_record:wrong version number in /home/domains/mydomain.com/web/public/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/StreamBuffer.php:261
[2021-06-06 16:05:48] flarum.ERROR: Swift_TransportException: expected response code 220 but got an empty response in /home/domains/mydomain.com/web/public/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php:447
Stack trace:
Flarum core 1.0.2
PHP version: 7.4.15
Loaded extensions: Core, date, libxml, openssl, pcre, sqlite3, zlib, bcmath, bz2, calendar, ctype, curl, dom, hash, fileinfo, filter, ftp, gd, gettext, gmp, SPL, iconv, session, intl, json, mbstring, standard, PDO, pdo_dblib, mysqlnd, pdo_pgsql, pdo_sqlite, pgsql, Phar, posix, Reflection, imap, SimpleXML, soap, sockets, pdo_mysql, exif, sysvmsg, sysvsem, sysvshm, tokenizer, xml, xmlreader, xmlrpc, xmlwriter, xsl, zip, mysqli, imagick, ionCube Loader, Zend OPcache
+-----------------------------+---------+--------+
| Flarum Extensions | | |
+-----------------------------+---------+--------+
| ID | Version | Commit |
+-----------------------------+---------+--------+
| flarum-suspend | v1.0.0 | |
| flarum-flags | v1.0.0 | |
| fof-recaptcha | 1.0.0 | |
| fof-forum-statistics-widget | 1.0.0 | |
| fof-user-bio | 1.0.0 | |
| flarum-approval | v1.0.0 | |
| flarum-bbcode | v1.0.0 | |
| flarum-emoji | v1.0.0 | |
| flarum-likes | v1.0.0 | |
| flarum-lock | v1.0.0 | |
| flarum-markdown | v1.0.1 | |
| flarum-mentions | v1.0.0 | |
| flarum-statistics | v1.0.0 | |
| flarum-sticky | v1.0.0 | |
| flarum-subscriptions | v1.0.0 | |
| flarum-tags | v1.0.1 | |
| fof-links | 1.0.0 | |
| fof-user-directory | 1.0.1 | |
| sycho-profile-cover | v1.3.0 | |
| madnest-lang-czech | v1.0.0 | |
+-----------------------------+---------+--------+
Base URL: https://mydomain.com
Installation path: /home/domains/mydomain.com/web/public
Debug mode: off