Resolution: Not A Defect
We have Installed Jenkins Version Jenkins 2.401.2 on Windows 2019 Server.
We have configured it with SSL and have installed suggested plugins, we have also copied our Old jobs from our Old Jenkins Server which is on Ubuntu 18.04.
Old Jobs are copied just okay and they looks okay. But when we try to create a new job on Jenkins by Clicking New Item and then give the job name and press okay, it gives us "Mode Given Error".
Also what we observed is we don't see option of types of jobs ( Freestyle,Multibranch etc.) only see copy from option which also does not work.
Any help on this will be much appreciated.