Server Specs:

Type: Fabric
Installation Version: 1.21.4
Relevant Mods:
MapFrontiers 1.21.4-2.7.0-beta.7 (Compat: 1.21.4)
JourneyMap: 1.21.4-6.0.0-beta.44 (Compat: 1.21.4)

Issue:

I am running the exact same installation of mods listed above on the client, but the option to change type from "personal" to "global" is not available:

I made myself operator from the server using op command

As you can see the option to change the frontier type is grayed out and not clickable.

Here are all the mods I am using:

All ENABLED mods in this photo are installed on both the server & the client, but any mod that appears DISABLED in this photo is ONLY installed on the server, but not the client

come to think of it bm and bmmarker can probably be disabled on client as well

Have you tried disconnecting and reconnecting to the server after becoming OP? If that doesn't work, have you tried restarting the server?

Unfortunately I am unable to replicate the problem on a server in the development environment. I don't know if the source of the problem is an incompatibility with a mod or plugin, a specific server configuration, or something else.

I will continue investigating.

I am having the same issue. I have tried disconnecting, restarting the server, looking through the .toml in the server config folder, but I see nothing that could help this

.dat files are in NBT format. They can be edited with a program like NBTStudio, for example. You can also create a single-player world, edit the groups and actions to your liking, and then copy the settings.dat file and replace the server one.

The problem probably isn't a permissions problem, but rather a communication problem between the server and client. If so, then editing settings.dat won't solve anything.
Please let me know how it went.

In the settings menu, the groups and actions tabs are grayed out and I can not click on them

Not sure if this helps. Could it be a permissions issue? Is it possible to get what the permission variables are called so that I can try editing them with LuckPerms?

In the server files > config folder > mapfrontiers-client.toml I do not see anything that seems helpful for this problem, but I am not sure why the server has the client settings.

In the server files > mapfrontiers > I see 2 .dat files, settings.dat and frontiers.dat, but since they are .dat files, I am unable to open and read what is inside. I tried deleting the settings.dat just in case and restarted the server, but it did not help

I ended up fixing it because I had slightly different fabric api versions. The server was running 0.125.0 and i was running 0.125.3 but when I went back a version (0.125.0) on my client, the groups and action tabs un-greyed.

I'm glad it's fixed!
@darmyn can you check if that's your problem too?

I don't know how to fix it as i'm also having issues with it