I get an 500 error at the WebAdmin and UserPortal.

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at admin 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.

Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.

Reboot and restoring the last backup did not change anything.

VPN Connections are working. I can connect through VPN with SSH.

This is httpd.log:

2017:02:24-19:29:10 mobile httpd[5053]: [core:error] [pid 5053] [client 10.242.2.2:63275] End of script output before headers: webadmin.plx<187>Feb 24 19:29:10 httpd[5053]: [core:error] [pid 5053] [client 10.242.2.2:63275] End of script output before headers: webadmin.plx
2017:02:24-19:29:10 mobile httpd: 10.242.2.2 - - [24/Feb/2017:19:29:10 +0100] "GET / HTTP/1.1" 500 -
2017:02:24-19:29:31 mobile httpd[5053]: [core:error] [pid 5053] [client 10.242.2.2:63280] End of script output before headers: webadmin.plx
2017:02:24-19:29:31 mobile httpd[5053]: [core:error] [pid 5053] [client 10.242.2.2:63280] End of script output before headers: webadmin.plx
2017:02:24-19:29:31 mobile httpd: 10.242.2.2 - - [24/Feb/2017:19:29:31 +0100] "GET / HTTP/1.1" 500 -
2017:02:24-19:34:43 mobile httpd[8456]: [core:error] [pid 8456] [client 10.242.2.2:63324] End of script output before headers: webadmin.plx<187>Feb 24 19:34:43 httpd[8456]: [core:error] [pid 8456] [client 10.242.2.2:63324] End of script output before headers: webadmin.plx
2017:02:24-19:34:43 mobile httpd: 10.242.2.2 - - [24/Feb/2017:19:34:43 +0100] "GET / HTTP/1.1" 500 -
2017:02:24-19:38:59 mobile httpd[8456]: [core:error] [pid 8456] [client 10.242.2.2:63372] End of script output before headers: index.plx
2017:02:24-19:38:59 mobile httpd[8456]: [core:error] [pid 8456] [client 10.242.2.2:63372] End of script output before headers: index.plx
2017:02:24-19:38:59 mobile httpd: 10.242.2.2 - - [24/Feb/2017:19:38:59 +0100] "GET / HTTP/1.1" 500 -
2017:02:24-19:39:00 mobile httpd: 10.242.2.2 - - [24/Feb/2017:19:39:00 +0100] "GET /favicon.ico HTTP/1.1" 200 758
2017:02:24-19:41:32 mobile httpd[5053]: [core:error] [pid 5053] [client 192.168.20.120:51431] End of script output before headers: webadmin.plx
2017:02:24-19:41:32 mobile httpd[5053]: [core:error] [pid 5053] [client 192.168.20.120:51431] End of script output before headers: webadmin.plx
2017:02:24-19:41:32 mobile httpd: 192.168.20.120 - - [24/Feb/2017:19:41:32 +0100] "GET / HTTP/1.1" 500 -
2017:02:24-19:41:37 mobile httpd: 192.168.20.120 - - [24/Feb/2017:19:41:37 +0100] "GET /favicon.ico HTTP/1.1" 200 758
2017:02:24-19:52:39 mobile httpd[5032]: [core:error] [pid 5032] [client 10.242.2.2:63589] End of script output before headers: webadmin.plx<187>Feb 24 19:52:39 httpd[5032]: [core:error] [pid 5032] [client 10.242.2.2:63589] End of script output before headers: webadmin.plx
2017:02:24-19:52:39 mobile httpd: 10.242.2.2 - - [24/Feb/2017:19:52:39 +0100] "GET / HTTP/1.1" 500 -

Any Ideas to get into WebAdmin again ?