Sermons List fails to sort by heading

After upgrading to Sermonspeaker 7 (Joomla 6), the Sermons List page fails to sort when clicking on headings eg Date or Title. The error message is as follows:0Sermonspeaker\Plugin\Sermonspeaker\Mediaelement\Extension\Mediaelement::createSource(): Argument #2 ($file) must be of type string, null given, called in /home/therefor/public_html/plugins/sermonspeaker/mediaelement/Extension/Mediaelement.php on line 171

Any help solviing this issue would be greatly appreciated, thx!

Thanks for the report. I have found the issue and released an update for the mediaelement plugin.
You should see the update to 7.0.1 in your backend.

Thank you so much again! Yes, plugin is working correctly now