Google Photo, a person has lost the shared albums that I shared with him. How to return?

Question

Google

I shared several of my photo albums from Google Photo with another user and everything worked.
Today I provided access to another album, an invitation to the mail came, but when I click the button in the message - "View Album" (Android phone) - we get a message - "Cannot find the link, this link has been deleted or the URL is incorrect."
It also found that the Google Photos app on that user's device was missing all the albums that were previously shared.
There is a suggestion on the Google forum that this user may have been blocked by me.
Indeed, in my account - https://myaccount.google.com/blocklist I found a blocked user. (I definitely didn't)
Deleted a blocked user and was able to share multiple albums.
Invitations to the user came to the mail, albums were added to Google Photo.
Within ~30 minutes, when trying to view the shared album, we again received a message about "Invalid link ..." All shared albums disappeared from Google Photo.
Now this user is not in the "Blocked" list, when I try to share it - "Invitation sent via Google Photo" appears in the album settings, a "gray" image of the invitee appears under the album name, but the user does not receive an invitation, and after refreshing the page with the album the invitation disappears...
How to solve the problem?
upd.
There is a suspicion
The contact that has problems with the Shared albums in contacts is, but if I start typing his name in the search bar ("live search") - it is not displayed, it appears only by pressing "Enter" ...
I tried to recreate the contact - it did not help. ..upd2
.
As a result, after unlocking the "blocked" account, within about a couple of days, messages began to arrive about granting access and the albums began to be added, the contact in Contacts took the usual form. Seems like you just have to wait...

Answer 1

The same situation, I accidentally blocked my girlfriend, she was removed from all albums, after which I unblocked her and tried to add her again.
1 way to add via Google photo, the person icon hangs for a while, it signals that I sent an invitation. But it doesn't reach her.
2 distribution of the album through the messenger, the same does not work

Answer 2

The same problem. It hasn't been two days yet. We are waiting)
The user was in blocked, but not in contacts, but only in hangouts.
The symptoms are the same - the invitation is sent and immediately disappears without reaching the recipient.
The link also does not work - 403 error.