Xibo Login on another Device

Hi, my problem is, if i log in me on zb my iphone in xibo the language is englisch snd when i get the user and pass in the message is coming with : username or pass is wrong??
But when i log in on my notebook user an pass is fight and the language is German. What is there wrong or what do i wgong?
About tipps thanks .i hope you understand what i mean?
I cant log in in some Devices with my right username and pass but on my notebook sll is ok

Markus

There shouldn’t be any difference between devices - the password is validated on the web server not the client - language shouldn’t make a difference either.

Sorry to ask - are you sure you are typing it in correctly on the other device?