Created attachment 163758 [details] error massage when i go to the koha administration module and click to libraries under basic parameters i found a internal server error massage. how to solve the problem? please help me out from here. thank you.
Please have a look at https://wiki.koha-community.org/wiki/REST_API_Debug If you still need more help you should provide more info about your setup (OS and Koha versions, what is the exact error in the Koha log files)