Notes won't sync, tried everything - please help!

Hello!

So, I use notes a lot and just two days ago I noticed it stopped syncing correctly. I usually sync it between my iPhone, MacBook and iPad with iCloud.

I have now narrowed the issue down to it being my MacBook that is the problem. My iPhone and iPad seems to be syncing correctly as I can see those test-notes pop up on iCloud.com, but my MacBook doesn't.

I have so far tried:
- checking so that it's the same iCloud-account on all of my devices

- restarting notes

- restarting my computer

- shutting of the "notes" function in iCloud settings on my MacBook and then putting it on again

- loggin out of iCloud on my MacBook and then loggin back on it

None of this have so far worked and I am now out of ideas!
Is this a known problem? Do you guys have any advice or ideas as how to solve it?