PMS 1.18.5.2309-f5213a238 won't upgrade

Plex Media Server Desktops & Laptops
2

Which version are you upgrading from?

I ask because of:

and the companion thread for reporting issues.

I’ll get it figured out but genuinely curious how it got there.
When was the value become “Domain User” ?

I cite POSIX:

4 Answers. Group and user names aren’t allowed to contain the space character on POSIX-style systems; see Command line login failed with two strings ID in Debian Stretch for references (the restrictions apply to groups as well as users).Nov 1, 2017