I found the fails, some entrys in the config table where deleted, but I don't know, why...
Here, the database revision tells us that you have updated to the github version 1.2.x (some days ago). The github 1.2.x branch is not the 1.2.11 version. So please, don't lie.
I tried to reinstall, maybe because of that the version in database was another...
Now another Error:
Path: /admin/reseller_edit.php?edit_id=2
Error: 400 Bad Request
That is not a fail... Those entries were deleted according the database updates...
SO NOW, just update to latest 1.2.x. (see my previous post).
Ok, I'll Update now 
//now I got another error 
I checked the Table "subdomain" and It's empty
Wait, I'll commit a fix in one minute.
Should be fixed. See https://github.com/i-MSCP/imsc…7a1e021b33b1422aa661c6b3d
You must download latest archive again at https://github.com/i-MSCP/imscp/archive/1.2.x.zip and update again 
problem solved,
thanks Nuxwin for the quick fix
