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Hello and thanks for this important plugin!
However, it does not seem to work properly. I use it in a multisite installation (WP 6.1, SQL 177, PHP 8.1.12) and as a super admin I can edit the entry of a user in the network administration as well as in a network site and set the nicename in the form and after saving it is also displayed as selected. If I reload the page, the old nicename is displayed. There was no change in the database, I checked that.
And just now I noticed that even if I changed the nicename in the database directly, it resets to the WP default (username) after an edit of the user.
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