Getting the following errors upon loading in Bugsack.

9x NOP/nop-data.lua:10: PRI_OPEN
[string "=[C]"]: in function `assert'
[string "@NOP/nop-data.lua"]:10: in main chunk

Locals:
(*temporary) = false
(*temporary) = "PRI_OPEN"

9x NOP/nop-button.lua:30: BUTTON_FRAME
[string "=[C]"]: in function `assert'
[string "@NOP/nop-button.lua"]:30: in main chunk

Locals:
(*temporary) = false
(*temporary) = "BUTTON_FRAME"

9x NOP/nop-profile.lua:14: T_CHECK
[string "=[C]"]: in function `assert'
[string "@NOP/nop-profile.lua"]:14: in main chunk

Locals:
(*temporary) = false
(*temporary) = "T_CHECK"

9x NOP/nop-events.lua:36: print
[string "=[C]"]: in function `assert'
[string "@NOP/nop-events.lua"]:36: in main chunk

Locals:
(*temporary) = false
(*temporary) = "print"

9x NOP/nop-core.lua:55: ARCHAELOGY_ANNOUNCE
[string "=[C]"]: in function `assert'
[string "@NOP/nop-core.lua"]:55: in main chunk

Locals:
(*temporary) = false
(*temporary) = "ARCHAELOGY_ANNOUNCE"

9x NOP/nop-item.lua:33: T_BAGS
[string "=[C]"]: in function `assert'
[string "@NOP/nop-item.lua"]:33: in main chunk

Locals:
(*temporary) = false
(*temporary) = "T_BAGS"

9x NOP/nop-slash.lua:26: T_CHECK
[string "=[C]"]: in function `assert'
[string "@NOP/nop-slash.lua"]:26: in main chunk

Locals:
(*temporary) = false
(*temporary) = "T_CHECK"

9x NOP/nop-quest.lua:33: print
[string "=[C]"]: in function `assert'
[string "@NOP/nop-quest.lua"]:33: in main chunk

Locals:
(*temporary) = false
(*temporary) = "print"

I do not.

It looks like Caedron Wardrobe and Mythic Dungeon Tools have them included though.

They likely have the Shim embedded, same as NOP. Could you try the latest alpha version with and without these addons?

With Caerdon Wardrobe, MDT, and NOP I get the following:

1x ...ddOns/MythicDungeonTools/libs/WagoAnalytics/Shim.lua:10: attempt to call method 'Register' (a nil value)
[string "@MythicDungeonTools/libs/WagoAnalytics/Shim.lua"]:10: in function `Register'
[string "@NOP/nop-private.lua"]:31: in main chunk

Locals:
self =

With just NOP no problems, with NOP and MDT no problem. Just seems to be Caerdon.

Looks like it. Seems like the embed is broken or outdated. I cannot help you there, unfortunately.

Not a problem. Thank you for all your assistance, and for keeping NOP alive.

Trying my best over here :)

That seems to be a follow-up error.
Please get BugSack and BugGrabber addons and post all NOP related errors.
You could try re-installing as well.

Those are multiple errors from Bugsack.

And I have uninstalled, reinstalled.

There seems to be at least one missing then, in nop-private.lua, that would cause the chain of the others.
What's your game version?

Sorry for the delay. I disabled all addons except for New Openables and get the following error:

Message: Interface/AddOns/NOP/WagoAnalytics/Shim.lua:1: attempt to index global 'LibStub' (a nil value)
Time: Mon May 6 09:09:35 2024
Count: 1
Stack: Interface/AddOns/NOP/WagoAnalytics/Shim.lua:1: attempt to index global 'LibStub' (a nil value)
[string "@Interface/AddOns/NOP/WagoAnalytics/Shim.lua"]:1: in main chunk

Locals: (*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index global 'LibStub' (a nil value)"

I had no problems when loading with other addons until I came to Caedron Wardrobe. When loaded with Caedron Wardrobe I get the following:

1x ...eCaerdonWardrobe/libs/WagoAnalytics/Shim.lua:10: attempt to call method 'Register' (a nil value)
[string "@CaerdonWardrobe/libs/WagoAnalytics/Shim.lua"]:10: in function `Register'
[string "@NOP/nop-private.lua"]:31: in main chunk

Locals:
self =

Do you perhaps have an older version of WagoAnalytics addon enabled?

FYI: You seem to not have tagged a new release yet.