every time I enter the lab in The Blueprint Designer Lab, this mod causes an error that forces me back to the main menu, it's acting as if I'm starting a new game and brings up the menu that appears at the start of a game, and then the error appears and am sent back to the main menu

It'd be nice to see the error.

Hey dont mean to necro this but im also having issues with this mod and any variant of Blueprint sandboxes
I believe it is an issue as said, where sandbox mod is treated as a new player but the mod does not like the fact that there is no "player" entity.

Let me know if you need a more permanent image source and i will update

https://cdn.discordapp.com/attachments/1103977113926762506/1235085560280776814/image.png

I don't have access to the image.

https://ibb.co/WKXCLW0

Ive uploaded it here, this should be viewable

It should work in theory on new version https://mods.factorio.com/mod/m-rpg_items/downloads

Ghm... it's probably wrong, but it should work...

Sorry to inform it still causes an issue potentially!

To clarify the steps a bit more as i did some bug testing and was able to reproduce very accurately.

This mod, Your Spells mod and Blueprint Sandboxes are the only installed
- Able to start up free play and swap between zones while both windows switch.
- Fill up the free play spell point buy and close the window
- Swap to blueprint world, blueprint world menu pops up
- swap back out it remains on the screen
- pressing any button on the point buy GUI causes the crash then

I was able to replicate it the 3/3 times i followed those steps. Hope this clarifies and helps!

Ah, do you have log of the crash or a screenshot of it?

I got the error.

Fixed: https://mods.factorio.com/mod/m-rpg_items/downloads

meh, I see other issues, but it requires refactoring.