user autocomplete doesn't work

[Admin]

We've recently upgraded our Confluence from 8.9.8 to 9.2.0 and we have the following plugins installed:
Scroll PDF Exporter
Space Privacy - Extranet for Confluence
Multiexcerpt Plugin4

And we encountered some problems:
If we try to assign users/groups/Admin Roles under Space Tools an error occurs, loading failed or it just keep loading but nothing happens. Now we can't work with extranet anymore.

[Radek Dostál]

Is this Extranet plugin supported for 9.2.0? Likely it could be incompatible from 8 to 9 due to API changes.

Either, you have to get a newer version for the plugin, or you should contact the developer for support as it's not native to Confluence, we don't know how it's supposed to work.

[Admin]

I've asked Seibert (the plugin manufacturer) and they told me it's a recently detected bug which occurs from Confluence 9.2.0 with Space Privacy 4.0.0. A new plugin 4.0.1 should be installed