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Fatal error PDOException


blacksrv
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Hi, I got this error after login to the backend:

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Fatal error: Uncaught exception 'PDOException' with message 'You cannot serialize or unserialize PDO instances' in [no active file]:0 Stack trace: #0 [internal function]: PDO->__sleep() #1 {main} thrown in [no active file] on line 0

Already tried to delete cache, disable all modules, update processwire to lastest version, nothing works.

Any idea of this error?

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