mautic problem after cdn

hi

mautic worked well, but when i installed cdn i don’t work anymore
I can enter to mautic but buttons don’t work, like if pages are cached
I deleted the cache folder on app, (mautic doesn’t create a new cache folder automatically)
i deleted it and reinstall it again but the same problem
I made a third new installation and I tried to change the name of the mautic directory but when I go to login page I enter the good username and password but it doesn’t enter and I go back to login page.
I tried to reset the password and the same problem exists

the cdn I used is cloudflare with ssl. Before I installed the cdn I worked with ssl and mautic worked well

what should I do to resolve this problem

upup

It’s an issue with your server, Where you install your mautic