This issue occurs if the quiz id and the post id is same. It happens while importing the data, please clarify if you have imported the quiz or posts in your website.
Also try creating a new test quiz and then check the issue.
If the issue persists in the new quiz also then please share the site url and the admin credentials with us to check the issue on your test setup.
Please mark your reply as private while sharing the admin credentials.
It is solved you can mark this topic as resolved. txs
Thanks for confirming, so closing the topic.