You will need to:
-
Change the site setting
slug generation methodtoencoded -
Refresh the page
-
Go and edit the problematic category, change the slug to an ascii one
-
Head back and revert the site setting change
You will need to:
Change the site setting slug generation method to encoded
Refresh the page
Go and edit the problematic category, change the slug to an ascii one
Head back and revert the site setting change