Hello/Hi/Greetings,

I upgrade Piwigo to the lastest version 2.9.3.
I have 5 users plus one admin.
The login works fine från a desktop computer (mac) but doesnt work from mobil devices. No iPhone, no ipad.
I got an error message: No user name or password.

I have created new users to check and I got the same problem.
Any suggestions?

Piwigo version: 2.9.3
OS: Linux
PHP version: 5.6.33
MySQL version: 5.6.34
Graphic library: ImageMagick 6.7.7
Piwigo URL: http://