When adding a profile rule on a per-group of users basis and the name of the group contains a space, for example:

sudo /etc/NX/nxserver --ruleadd --class node --type testdrive --value yes
--group 'test users'

the nxserver.log reports messages like:
229834 229834 2022-12-11 14:55:58 613.196 NXSERVER WARNING! NXRedis: command line 'command=sadd,service=db,key=profiles.groupsToCheck,field=test users\n' cannot contain spaces.