Approval issue created: CONTRIB-7652

I got this error:
Debug info:
Error code: invalidcoursemodule
Stack trace:

line 236 of /lib/modinfolib.php: moodle_exception thrown
line 58 of /blocks/export_quiz/export.php: call to course_modinfo->get_cm()

Output buffer:
Notice: Trying to get property of non-object in /home/pm1yedpj/public_html/moodle2/blocks/export_quiz/export.php on line 58

can anyone describe a little bit of this plugin? Is the exported quiz can be used offline or just simply editable by a text editor?

It allows you to download the quiz in different formats available.
It could be text, word, xml or any other available format.

This seems to create a block which can be added to the quiz editing page. That in turn seems to be just a short cut to the standard Moodle question bank export system?

Ah, sorry if the description wasn't clear enough!
No it isn't just a shortcut to export a question bank.
Moodle currently only allows us to export a question bank but not a quiz as a whole.
This plugin creates a block which let's u download the quiz instead of the question bank!

I got the same error and messages as @Dinis Medeiros.
It was installed on an old moodle site (ver. 3.0.5) in order to export quiz contents from some courses to a new moodle site.
Thanks in advance

Same error happened to me . Can anyone help?

Same error on Moodle 3.8.4.