Anytime I want to soft delete a thread, it always show this error
Check below image
1) mysql and php versions?
2) inline moderation or moderation from within the thread?
Moderation within the thread
The inline moderation uses cookies via javascript... I don't know how smartphones are able to manage that.
Did you try using a browser with a computer ?
Im 99% sure that this has something to do with your htaccess url rewrites.