Error after transfer

[Frank]

Hello, after the transfer of the system to the new server error appears:

in log:
[2015-12-24 08:26:46] Espo.WARNING: E_WARNING: json_encode(): Invalid UTF-8 sequence in argument {"file":"/home/.../application/Espo/Core/Utils/Json.php","line":43} []

and i do not see any russian text...

when i want create a new entity - i have error 501

php 5.4

[yuri]

Hi

Maybe wrong encoding of database.

[Frank]

encoding in norm - utf8