Authorization flies. Where to dig?

Question

PHP

There was a problem on the webasyst engine that users began to fly off in the admin panel. Moreover, the problem appeared gradually for everyone, but not for everyone at the same time. There is no problem in incognito. But I do not know how to fix the error in a regular tab. I cleared the cache (in various ways, starting through the settings and ending with cmd + shift + r), deleted all cookies, the problem still remains. And everything is ok in incognito)
What else can be cleaned up that cleans up incognito?

Answer 1

You may have run out of disk space