WP_User_Meta_Session_Tokens::create() in /public_html/wp-includes/pluggable.php

I’m having the same problem after update core from 3.5 to 4.0…

Hi,

Did you see the problem immediately after the upgrade or after a while.

I’m working with Sandeep and we had been running with 4.0 for two weeks before this problem suddenly started happening. It was solved by adding back-in the following to the .htaccess file:
php_value memory_limit 512M
php_flag eaccelerator.enable 0
php_flag eaccelerator.optimizer 0

We’re 99% sure these had already been set and they hadn’t manually been edited or overwitten. Is there anything that could have overwritten/updated the .htaccess file?

In this thread there is more information:
https://www.ads-software.com/support/topic/cant-login-after-400-update?replies=37 however, it doesn’t help me. I replaced manually with a fresh WP and still the same.

Thanks for the help tim.lewis.croftedge.

It happened immediately after the upgrade. I’m in a shared hosting and I guess the memory was not enough for this new version.

Your suggestion was showing a 500 error in my server, but instead I added a php.ini file with this line to wp-admin folder:
memory_limit = 512M

Now it works again ??