Error: Attmpted to create second instance of HiddenComponentCheckbox singleton

Bugs and Other Issues
1

I'm working on a project for over a year or something, and at some point when loading it, I see a brief error message pop up saying

Attmpted to create second instance of HiddenComponentCheckbox singleton

before about 1 seconds for the editor to pop up on the screen.
I think red text is bad news so I'm asking it here: Is this error safe to keep editing or do I have to do something to my project?
My project .aia file size is currently 1952KB.
Here's a view of my chrome console logs:
(3) SEVERE: System error: Attmpted to create second instance of HiddenComponentCheckbox singleton

2

You can ignore that error