Welcome to the forum, @bamicee 
Yes, the game is still on development, so when something went wrong on the code, you get those popups with errors (there’s a “Close Permanently” button there which should make the popups to cease even if there are more errors, if you don’t want to see them).
If you see the number of errors on the popup increasing too fast in a few seconds and it doesn’t stop, you should close the game! The error is being fired in a loop, so it won’t stop never, taking up all of your available memory unless you close the game.
Unfortunately those errors can happen randomly, so if you’re fast and can take a screenshot of the error it’d be useful for the devs.
You can make a new topic on this forum on the Support->Active Bug category, with a screenshot of the errors you get, and what was going on the game when they appeared.
Also, if you have a savegame which fires the error once it’s loaded, it’d be really useful for the developers.
I hope this explanation was helpful enough 