When running the OPL-update script on our production server, I get the error below. The error pops up immediately as I hit the Enter key to start the script. The script run and completes with no other errors. However, the error does not occur on our test server, which runs the exact same version of Webwork. Does anyone know what produces the error, and how to get rid of it?
Use of uninitialized value $WeBWorK::Constants::WEBWORK_DIRECTORY in concatenation (.) or string at /opt/webwork/webwork2/lib/WeBWorK/Constants.pm line 38.