Following my Wordpress update to 5.9.x, I'm unable to attach a file in my forum.
The icon is present but nothing is done when I try to attach the file, either with Firefox or a Chrome based browser.
Do you know what can cause this ?
This issue is seen with administrator account also and it was working fine.
Go to Dashboard > Forums > Tools, check Do not allow to attach files with following extensions field.
I checked and don't have this option (it's in french but the boxes are the same).
As I said, it's not linked to new users, this behaviour happens for all users.
I'm thinking that it's linked to the way it's managed with the new Wordpress 5.9.x update.
Also, We tried to add files with jpg extensions, so not the ones in the antispam rule.