Nightmare with User Management and User Preferences

I have done my best working on User Management and User Preferences chapters.
My tests passed for those topics. Still the result of the validation is “User Management (or User Preferences): invalid response to logout”. And my application log is clean and free from any errors/exceptions.

My JDK is 11.0.2 by Oracle, and I have jaxb-api dependency, version 2.3.1, in my project

Is there anything else I can do to stop this nightmare?

I was also facing the same issues switching to 1.8 resolved all the issues for me.

But switching to 1.8 causes problems with certificates… at least in my case.
To what version exactly and distributed by what site did you switch ? Thank you