My client would like editors to have access to the taxonomy manager but not have the "administer taxonomy" permission (so that they can edit terms but not vocabularies).
Currently, users without that permission get an ajax error when they select any terms on the TaxonomyMangerForm. This is because when they select a term, they get the _taxonomy_manager_access_check on the Edit taxonomy term form but the access check doesn't check the correct route parameter, which is 'tid'. So they get the loading spinner infinitely.
Check for the 'tid' parameter, load the vocabulary, check 'edit vocabulary [vocabulary]' permission
Active
2.0
Code
I'm having the same issue and the patch in MR !69 and it's fixed the issue for me.