Verify if the issue types "Test scenario", "Test Run" and "Test Case" are present under your Issue Type Scheme under column "Available Issue Type" and map them to column "Issue Type for Current Scheme". Refer attached screenshot for the steps.
b) If The issue types are not present on Available Issue Type column (shown in screenshot) please follow below steps to re-install the add-on.
Here is what we would suggest:
After the reinstallation of the add-on is done, your default QMetry Issue Types will be restored, which you would need to map as per the steps in this article.