Running debian8, after an OS update (not upgrade) and ispconfig upgrade the server works all right but ispconfig interface does not, the only error found in any log is the one in the subject line, in /var/log/apache2/error.log, no other errors found, on port 8080 the response is below We run many servers with ispconfig and this is the first time we've run into this issue. Much appreciate any input. Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator at [email protected] to inform them of the time this error occurred, and the actions you performed just before this error. More information about this error may be available in the server error log.