Inability to login to non profit hub

Hello everyone,

I have signed up our non-profit organization for Microsoft Non-Profit and it was approved. In the approval-mail I was instructed to go to the "non-profit hub" to sign in and select the plans we would like to use. (Nov 2024). I did this and created initial access.

After some interval, in Aug 2025, I tried to access this but got a message that the user doesn't exist - I use my personal MS365 account, hence, the delay. I wanted to set up access for a couple of other users at the non profit. 

I've tried different browsers (Edge, Chrome, Safari, Firefox) as well as different devices, the result remains the same. The username and password are correct - the former was additionally given in the approval-mail, the latter was checked several times.

Also contacted Techsoup - got an email but no resolution. How does this grant get re-activated? Will appreciate a meaningful response.

Thanks in advance.