Hi, Robert!
Yes, OpenSIPS Control Panel should work without problems.
I double checked the line you get that error[1], but it doesn't seem
anything wrong over there. Can you post your file on pastebin so I can
check your version?
[1]
I installed https://github.com/OpenSIPS/opensips-cp/archive/6.2.zip
And I am getting a parse errors for list_admins.main.php which I assume means
there is an error in the php code.
Below is the error log, but note the line number might be a little different
from source code because I tried