Solved [K.5.0.RC5] "User is missing" when logging in using Kunena

I quite recently updated to RC5 and started using PHP 7.0.8 and Joomla! 3.6.0. I have cache enabled if that matters, and I use JotCache for caching.

I can log in using the normal Joomla Login, and then I'm also logged in on the forum, but if I use the login through Kunena forum layout, with same credentials, I get a message about that the User is missing, and I'm not logged in. The username does contain a whitespace, if that makes a difference. Not quite sure if I can get more info than that, since I don't get any other error messages.

try to disable the jotcache, then do clean cache, and try again.

Thanks for answer!

I just tried that and also disabled caching completely in Joomla!. It's still the same unfortunately. I did however just try to login using another account, which doesn't include any white-space, and it actually worked. Not sure if it's a coincidence, but I'm a programmer myself and know special characters can mess up comparisons between strings etc. if such are made while e.g. encoding/decoding. The user obviously exist for Joomla! but not when kunena checks for it, so there must be some difference in the login phase or passing data from kunena to Joomla!.

Anything else I can try?

yes, looks kunena strips the space. Will check it out.

when I login as demo 1, then he will load the demo1 account. If you have the same password, then you login as demo1, else you get a wrong password error

Fix github.com/Kunena/Kunena-Forum/pull/4196/files

Nice!
On line 468 I guess you could replace $app->input with $input though.