(kinda found a fix, I had to remove an addon which somehow was interfering with SMH so it could be any random addon. I deleted multiple so I can't exactly give an example)

I have been using SMH for about a month now and it started doing this error, not sure if anyone had it,
but every time I try to middle click (duplicate) a frame it deletes a couple of my frames and tells me that an error occurred, gives the frames back after a couple of other clicks and then when I try to play the animation it just plays every recorded frame and not the the extra frames it automatically makes for you,

it shows me a couple of different things on the console

[Stop Motion Helper] lua/smh/rxlua/rx.lua:86: lua/smh/client/derma/frame_pointer.lua:90: attempt to perform arithmetic on local 'position' (a nil value)
1. _onError - [C]:-1
2. onError - lua/smh/rxlua/rx.lua:86
3. tryWithObserver - lua/smh/rxlua/rx.lua:19
4. _onNext - lua/smh/rxlua/rx.lua:498
5. _onNext - lua/smh/rxlua/rx.lua:77
6. onNext - lua/smh/rxlua/rx.lua:77
7. Position - lua/smh/rxlua/rx.lua:1971
8. createUiFrame - lua/smh/client/derma/smh_menu.lua:183
9. _onNext - lua/smh/client/derma/smh_menu.lua:210
10. onNext - lua/smh/rxlua/rx.lua:77
11. ActiveFrames - lua/smh/rxlua/rx.lua:1971
12. Function - lua/smh/client.lua:59
13. _Apply - lua/smh/bivalues/bivalues.lua:281
14. _ApplySynced - lua/smh/bivalues/bivalues.lua:260
15. func - lua/smh/bivalues/bivalues.lua:386
16. unknown - lua/includes/extensions/net.lua:32


and

[Stop Motion Helper] lua/smh/rxlua/rx.lua:86: lua/smh/rxlua/rx.lua:86: lua/smh/client/derma/frame_pointer.lua:90: attempt to perform arithmetic on local 'position' (a nil value)
1. _onError - [C]:-1
2. onError - lua/smh/rxlua/rx.lua:86
3. tryWithObserver - lua/smh/rxlua/rx.lua:19
4. _onNext - lua/smh/rxlua/rx.lua:829
5. onNext - lua/smh/rxlua/rx.lua:77
6. output - lua/smh/rxlua/rx.lua:1971
7. unknown - lua/smh/shared/rxutils.lua:51

and

[Stop Motion Helper] lua/smh/server/positioning.lua:32: attempt to perform arithmetic on field 'Position' (a nil value)
1. GetPositionFrames - lua/smh/server/positioning.lua:32
2. PositionEntity - lua/smh/server/positioning.lua:67
3. PositionEntities - lua/smh/server/positioning.lua:91
4. Function - lua/smh/server/data.lua:54
5. _Apply - lua/smh/bivalues/bivalues.lua:281
6. _ApplySynced - lua/smh/bivalues/bivalues.lua:260
7. func - lua/smh/bivalues/bivalues.lua:386
8. unknown - lua/includes/extensions/net.lua:32

and

[Stop Motion Helper] lua/smh/server/data.lua:114: Invalid frame!
1. error - [C]:-1
2. Function - lua/smh/server/data.lua:114
3. _Apply - lua/smh/bivalues/bivalues.lua:281
4. _ApplySynced - lua/smh/bivalues/bivalues.lua:260
5. func - lua/smh/bivalues/bivalues.lua:386
6. unknown - lua/includes/extensions/net.lua:32

I haven't touched anything relating to SMH so Idk what happend exactly.