I have created a Power Automate flow to sync items in a SharePoint List with a shared Outlook calendar. Users add events to the Outlook calendar and then the flow transfers the information to a SharePoint list. One of the columns in the SharePoint List is a link to the Outlook Event so that users can easily navigate back and forth between the two when necessary. The flow is working well, but the Web Link in SharePoint does not. It opens perfectly fine for me, the owner of the flow. But when other users click on it, it gives them this error:

I am using the 'Web Link' dynamic content from the 'When an event is added, updated, or deleted V3' action.
Because the link works for me but not others, it would seem to be a permissions issue. But I've checked with my IT team, and we agree that everyone has the same permissions within the SharePoint List and within the Outlook shared calendar. I built another, more simplified flow for a different calendar/list and the problem was the same. So, it is not unique to this list/outlook/flow combination.
Has anyone else had similar issues? Any ideas on how we might troubleshoot further? I can't understand why Office 365 would indicate that the event no longer exists only for other users.