Previously saved plan will not open

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/report-a-bug/previously-saved-plan-will-not-open/
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I have saved plans in the past and when I went to visit them later I was bitten by the message "We could not calculate your plan -- Invalid addresses". I haven't been able to find a solution as searching help, the manual, your FAQ, and your forum do not yield a result for this message. It would seem we should at least be able to get the name of the locations so we can rebuild a route if the address has changed in your database making them unopenable. I'll leave the Route 66 Tour entry in my Saved Plans if you guys wanna follow up.