SuiteCrm 7.7 new instalation+change themes issue

Dear All
i install SuiteCrm 7.7 on my local host , it very useful. i try change theme of user in profile but it get show password tab as red also i try change password it just refresh page and nothing happen ,
somebody can help me to solve it ?
apache 2.4 ubuntu php 7.1


I’m not 100% certain on what your issue is.
Would it be possible to pass over screenshots of the issue for better understanding?

Also, SuiteCRM 7.7.1 has been released, which has a few bugfixes over the vanilla 7.7
You may wish to install this, and see if your issue has been resolved.