After Domoticz, a trial with Gladys to see if it's more user-friendly

Citation

I think I misunderstood the following post:

Actually, it’s about setting up Gladys Plus as a Desktop application for Firefox users.

However, when on my Android smartphone, in Firefox, I enter 192.168.1.XX/login
Then I enter my email address and password,
I get a message: Invalid email address or password.
I have deleted the form history, cookies and active connections, the cache and site settings, closed and reopened Firefox, but nothing works.
Any idea what the problem might be?