Unable to add labels in the template that uses the new editor i.e Meeting note

Summary

When editing a new editor template, clicking on the label will throw out "Something's gone wrong. Try again later." error.

Environment

Cloud

Steps to Reproduce

• Edit the meeting note template
• Click on the label button

Expected Results

Able to add labels

Actual Results

"Something's gone wrong. Try again later." error.

On the Dev console, we can see error 500:

GET https://<instance>.atlassian.net/wiki/rest/ui/1.0/template/61026de2-2f3e-489a-9c07-b48509892c00/labels 500

Workaround

There is no workaround at this time.