Error 500 & White blank page just for some pages in website

[goldenwaycn]

After active Cloudflare some pages in website showing error 500 & quick view windows is white blank.

[sdayman]

5xx records come from the web server. Check through your server logs for more information on why this is happening.

Community Tip - Fixing Error 500: Internal Server Error

Error Try the suggestions in this Community Tip to help you fix “Error 500: Internal Server Error”. Background An Error 500: Internal Server Error generally means the origin web server has encountered an unexpected condition and was unable to fulfill the request. This is a blanket error message for any internal errors that prevented the origin web server from fulfilling the request and that were not caught at the origin. [Domain Registrar] Quick Fix Ideas In the rare event that an except…