File uploads are blocked with white screen and text "Invalid Token"

[cavis]

After logging in on the front of the site, and trying to upload a file, I get a white screen with the words "Invalid Token".
I tried logging out all users, browse in a private window, use another browser. Even clearing the Joomla cache and restarting the webserver. When I force "return true" in /libraries/src/Session/Session.php checkToken(), everything works fine.

Googling the issue, this last option emerged: If the "Invalid Token" message is appearing on a certain extension, contact the developer. Ask them to check and make sure that their forms are adding the security token. You can provide them with this Joomla documentation. https://docs.joomla.org/How_to_add_CSRF ... g_to_forms

But then, I don't think the extension itself is failing? Does someone have a solution for me? Thanks!

[cavis]

Sorry, what I forgot to mention: it worked fine before updating to the latest Joomla / Phoca version.

[cavis]

To be more specific:
PHP 8.1.2-1ubuntu2.13
Webserver nginx/1.18.0
Joomla! 4.3.3 Stable [ Bora ]
Phoca Download version 4.0.6

[Jan]

Hi, unfortunately, no idea, why there is advice to contact extension developer as the session is managed by Joomla not by extension.

I see, you have clean the cache, but do you use some cache feature (core, external extension, etc.)? If yes, can you disable it completely - only for test.

See your console (e.g. in Chrome browser, enable DevTools and see if you don't get any error message in console), maybe there will be some problem listed

Jan