Issue with adding lorebooks
 

I am using the following addon's installed via Minion.
Bandits UI and Skyshards. I am trying to add in Lorebooks but I get the following error message:

LibGPS2 compatibility layer was loaded more than once. Please ensure that its files are not included from other addons.
stack traceback:
[C]: in function 'assert'
user:/AddOns/LibGPS/compatibility.lua:7: in function '(main chunk)'
|caaaaaa<Locals> MAJOR = "LibGPS2", MINOR = 22 </Locals>|r

My guess would be that LibGPS2 compatibility layer was loaded more than once. Please ensure that its files are not included from other addons.

It says its a dependency for both lorebooks and skyshards so I installed it seperately

There's a chance that it's embedded in an addon and needs removed so that you only have the one copy that you installed directly.

Well I have no idea. Both Skyshards or Lorebooks will not be possible to enable without it.
Bandit and Skyshards work fine.
Bandit and Lorebooks work fine.
But Lorebooks and Skyshards dont' work together and give that error message.

Hmmm, SkyShards and LoreBooks shouldn't have any issues being used together and neither of them include LibGPS

Well I have no idea what to do.

Its odd that I have to actually delete the lorebooks folder in addons before the error clears. I can't just disable it and reload UI, or restart and have skyshards work.

actually have to delete libcustommenu as well

I've just uploaded a new version which should fix this bug. The check handled the absence of LibStub incorrectly.

So I should just have to update Libgps when the download is excepted?

Correct, update LibGPS.
But you should aloso search your addons for "included old" LibGPS versions (most of the time they ship in a subfolder /lib or /libs of the addon) and maybe remove them, in order to let only the newest version of LibGPS load and work properly.
Tell the addon devs of the addons where you find the included "old LibGPS versions" that they should update properly and include the libs with their own lib's txt file (so the addon manager of ESO will find and skip them if they are old!) or remove the included libraries in their addons!

Out of the mods I have (although I have modified mine) the ones that could have a copy included when it shouldn't are Harvest Map, LibGroupSocket, and Raid Notifier.