Same issue for me ! (on WP 6.0.2 and plugin v4.3.1)
Thank you so much!
I downgraded to v.4.16.0 and that fixed the problem indeed.
Happy again!
I have the very same error ! (error already present before the recent update of your plugin)
“Starbox Note: No file was uploaded.
Warning: Cannot modify header information – headers already sent by (output started at /home/xxxxx/public_html/xxxxxxx.com/wp-content/plugins/starbox/themes/admin/Notices.php:9) in /home/xxxxx/public_html/xxxxxx.com/wp-includes/pluggable.php on line 1219
When I continue (hit enter to load that error-page again, I get “invalid user ID” BUT the changes are applied !
I have the same problem (theme: “Viewport”). Please fix this ASAP
