The messegae below pops up when grading assignments. There were no documentations to refer to, so I might aswell ask the community if they have resolved a similar case.
The following are the error details:
Error code: generalexceptionmessage * line 61 of /mod/assign/db/services.php: ParseError thrown * line 185 of /lib/externallib.php: call to external_api::external_function_info() * line 79 of /lib/ajax/service.php: call to external_api::call_external_function()
Cedric, did you ever find the solution to this? This is happening in one of our Moodle 3.9.4 course forums.
Just wanted to report back that in our case the forum was set up to use a rubric for grading (see Whole Forum Grading section of setup page) yet there is no defined rubric. The solution was either to define rubric. or to change the grading method to something else.