Hello/Hi/Greetings,

I get this error  when opening the login page and I can't go further with the login:
Warning:  [mysql error 1366] Incorrect string value: '\x83\xC0\x01\xAApw...' for column 'data' at row 1
REPLACE INTO piwigo_sessions
  (id,data,expiration)
  VALUES('C0A83c83cs0estdnb195orkutmr0n4','��
�pwg_device�desktop�pwg_mobile_theme�',now())
; in /usr/local/zy-pkgs/ffproot/ffp/opt/apache-htdocs/albums/include/dblayer/functions_mysqli.inc.php on line 830

I have:
[mysqld]
character-set-server=utf8
collation-server=utf8_general_ci
[mysql]
default-character-set=utf8

What should I do ?

Piwigo version: 2.7.4
PHP version: 5.6.9
MySQL version: 5.6.25
Piwigo URL: http://