PHP Notice: unserialize(): Error at offset 0 of 8 bytes in ...app/functions/fn.cart.php on line 2005, referer ...php?dispatch=orders.manage
After the upgrade to the 436 began to emerge this error. Where could be the problem?
It seems that the value of the $config['crypt_key'] variable in the config.local.php file of your installation was changed, that is why the issue occurs. Please replace it with the old one and check the issue again. Sensitive information is encoded with the help of this parameter.
I also have the same problem
I just restored my sql backup to new installation on new server.
can we find old cryptkey on sql backup?
Hi!
No, this information isn’t stored in the database, but in the config.local.php file of your installation. If you still have access to the server you moved from, copy the value from this file from the old server to the new one.
unfortunately, my old server hacked and all data encrypted.
i have no access to old data.
what i had on my pc just an sql backup
I am feeling sorry for your loss 
Unfortunately, there is no way to recover the payment data without knowing the original encryption key, otherwise it would not be encryption.