Hi there,

i want to try out openpoject in a virtual machine (virtualbox) with debian 9 (using turnkey linux core 15.0).

But when i configure it it gives me an error:

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

Please contact the server administrator at [no address given] 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.

Apache/2.4.25 (Debian) Server at xxx.xxx.MY.IP Port 80

What i did:

apt update

apt upgrade

wget -qO- https://dl.packager.io/srv/opf/openproject-ce/key | apt-key add -

apt install apt-transport-https

wget -O /etc/apt/sources.list.d/openproject-ce.list \

https://dl.packager.io/srv/opf/openproject-ce/stable/8/installer/debian/9.repo

apt install webmin-apache webmin-mysql

apt update

apt install openproject

openproject configure

1.install and configure mysql-server locally - y
2.install apache2 server - y
3.fully qualified domain name - openproject
4.server path prefix: empty
5.ssl - no 
6.subversion - y
7.git - y
8. send emails? - sendmail
9.admin email - my@email.com
10. install memcached server? - y

for git and subversion paths i clicked what the configuration offered as default.

When i do the same - but choosing git and subersion "no" - it works. Although i am not sure i will need them - an error probably isn't the default result. Also I am not sure what some of the configuration options mean (like No. 3+4)

Does anyone have an idea where my mistake is, or what i did wrong? Any hint would be great.

Attached a textfile of the terminal-output after the configuration.