That's definitely frustrating. Are these boards part of a team board and are these links active and shareable? By that I mean they weren't disabled, similar to what's shown in the last screenshot of this article: https://help.trello.com/article/1024-invite-people-by-using-a-shareable-link?
I'm sorry to hear about the trouble. Our latest version of Trello is experiencing a bug with board invites. The team is aware of this bug and we are working diligently to get it squished. We don't have an ETA on when a fix for the issue will be pushed, but as soon as one is available we will deploy it.
If you had to thrive a new habit during a lockdown, what would it be? Trello
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