Cannot share and collaborate on a collection

[igghera]

Describe the bug
I have created a collection and shared in collaboration with colleagues. After one day I am no longer able to share it with anyone else even with a fresh new invite link

To Reproduce
Steps to reproduce the behavior:

1. Create a collection
2. Click on 'Share'
3. Click on 'Collaboration'
4. Click on 'Invite'
5. Send the link to someone
6. Open the link
7. You get an error message that says: "Becoming a member of the collection is impossible.
   The URL is invalid or out of date. Please ask the collection's author to invite you again."

In the Network tab the response is this:
{"result":false,"status":400,"errorMessage":"Incorrect or expired token"}

Expected behavior
The collection should be added to the recipient's list and they should be able to collaborate on it

Screenshots

Desktop (please complete the following information):

• OS: Windows, MacOS
• Browser: Chrome, Edge, Safari
• Version 5.6.95

Smartphone (please complete the following information):

• Device: iOS
• OS: Latest
• Browser: any

Additional context
The weird thing is that yesterday we were able to share and collaborate on a collection, now it has changed. The only thing I can think of is that I have added a password while originally I was using the Google login. I did this because the iOS app was not able to log in with Google.
We are looking for a tool to use in our agency and we love the product so far and considering PRO, but if we can't share collections among coworkers it becomes unusable for us.
We tried both directions (share my collection to someone and then from someone to me).
We tried creating a new collection, we tried from mobile and desktop, we tried everything.
We re-generated invite links 20 times, enabled and disabled.
I'm a senior software developer and I can help debugging on my side but as far as I can tell the problem is server-side as the api request comes back with the error I pasted above and there is nothing I can do about it.