Monitor URL returns 404 even though it exists

My question:
I created a collection over 2 years ago and used it for monitoring.

I’ve been getting weekly mails about the performance, as expected.

Since then, I’ve joined a team in Postman and my collections got added under the team workspace.

While I still receive mails with performance statistics, as you can see on the screenshot below, the blue HC monitoring link takes me to a 404 page.

I can also see that the collection disappeared from my workspace and it’s not in the team workspace either but I keep receiving new mails, so it must exist.

Does anyone have any idea how/where to find that collection?

Details (like screenshots):


How I found the problem:

Clicked on the monitors tab to see performance for a longer period of time but there are none:

I’ve already tried:

We tried to remove my user from the team and test if I’ll be able to use the link but the result is the same.