Cannot invite people to boards that I own

Hello,

when I try to invite people to boards that I created / own, sometimes I can invite them, but sometimes I get the following error screen:

I excplictly AM the owner of the board and wear my crown 😉

Funny enough:
When I duplicate my board, I can invite people to the duplicated board. But then, after a while some boards give me the same error again.

I could invite 2 people of my team onto this shared board, when trying to invite other people the screen popped back up again.

I use monday for 2.5 years now, but this issue is new to me.

What am I missing? Is this a bug? Is it related to a new feature and I have not setup some necessary framework to invite people to my boards?

Help is highly appreciated, as it stops me from inviting people to project boards with strict timelines.

EDIT: If I click invite about a dozen times, sometimes I get the cactus now, sometimes I can invite people. This seems to be a monday issue?

Thanks in advance.
Timo