Failed to load libGL

[mb <nc-bierhoma@netcologne.de>]

Hi!
I am running a newly installed Debian stretch stable 64Bit.
When i try to execute a game via wine or playonlinux i get an error like 
this:

0009:err:wgl:init_opengl Failed to load libGL: libGL.so.1: cannot open 
Shared-Object-File: File not found

Apparently i miss opengl.
I did some research on the web and on my system but couldn't find a 
solution yet.


More info:
file
/usr/lib/x86_64-linux-gnu/libGL.so.1
exists and points to
/etc/alternatives/glx--libGL.so.1-x86_64-linux-gnu

I am running the prop. nvidia driver 390.87 installed stretch-backports.



Maybe someone can help me..