Play audio URLs
composer require zerosonesfun/flarum-ext-sm2
composer update zerosonesfun/flarum-ext-sm2 php flarum cache:clear
Also, clear your browser cache and cookies. Also, clear things like your cloudflare cache if you are using a service like that. Basically, clear everything after an upgrade.
Simply paste your audio URL into a post. Or, create a normal link to the audio file using any Flarum compatible BBcode or Markdown.
Now go forth and spread music across your Flarums.