The error that showed up I fixed by renaming dir: vendor\terabin\flarum-ext-sitemap to vendor\terabin\sitemap. Now the error is gone. But no functionality still...
[23-Dec-2017 03:43:11 UTC] PHP Fatal error: Uncaught exception 'ReflectionException' with message 'Class Terabin\Sitemap\Listener\GenerateSitemap does not exist' in /home/helptanks/public_html/vendor/illuminate/container/Container.php:741
Stack trace:
#0 /home/helptanks/public_html/vendor/illuminate/container/Container.php(741): ReflectionClass->__construct('Terabin\\Sitemap...')
#1 /home/helptanks/public_html/vendor/illuminate/container/Container.php(631): Illuminate\Container\Container->build('Terabin\\Sitemap...', Array)
#2 /home/helptanks/public_html/vendor/flarum/core/src/Foundation/Application.php(514): Illuminate\Container\Container->make('Terabin\\Sitemap...', Array)
#3 /home/helptanks/public_html/vendor/illuminate/events/Dispatcher.php(149): Flarum\Foundation\Application->make('Terabin\\Sitemap...')
#4 /home/helptanks/public_html/vendor/illuminate/events/Dispatcher.php(135): Illuminate\Events\Dispatcher->resolveSubscriber('Terabin\\Sitemap...')
#5 /home/helptanks/public_html/vendor/terabin/flarum-ext-sitemap/bootstrap.php(7): Illuminate\Events in /home/helptanks/public_html/vendor/illuminate/container/Container.php on line 741
I did this after following the vendor\Flagrow\Upload & vendor\Flagrow\Bazaar extensions.
@AllysonSouzaNopSai Please have a look and let me know about this error above...