Instance config may reference un-existent categories
About page doesn't show up and console display the following error message:
core.js:6479 ERROR Error: Uncaught (in promise): TypeError: Cannot read properties of undefined (reading 'label') TypeError: Cannot read properties of undefined (reading 'label') at instance.service.ts:86
A PeerTube instance may be associated with one or many categories. Config may still reference categories which were deleted afterward.
Go to instance config page: https://tube-test.apps.education.fr/admin/config/edit-custom#instance-information
Delete referenced categories.
Find a way to remove the related instance category when the category is deleted