Claim names are not displayed

[Blackmadman]

If I give a normal player claim a name, no error message comes up, the plugin says that the claim now has the name but when I use /claimlist, no names are displayed, only the normal claim list with the world and the coordinates of the claim. There is also no error in the log.
The file names.data is created and when I name a claim, the claim number and name are also entered there. Apparently, however, they are not read or simply not displayed.

Minecraft 1.21
latest Paper 1.21

[RoboMWM]

provide config and am curious if this works on spigot