Centos 7, lastest ISPConfig update installed. updated os. websites accessible control panel results in Internal Server Error made sure everything is updated. same error. where is the error.log for ispconfig? or what cmd line code can i run that test out that will show me some diagnostics. One error.log stated that the execution had a error in execution but can not find that reference again. One day was accessible the next day internal server error. Normally an update seemed to fix the issue but not this time.