Hello,
I'm new to Power Apps and I've got this really old app handed down to me, created by my predecessor (or maybe two before me). There are multiple data sources in it, and four of them aren't refreshing properly, causing this error when running the app:

My guess is that these data sources are Excel spreadsheets stored in some OneDrive accounts within our organization.

I've scoured the internet to find a way to locate these data sources, but unfortunately, no luck.
Could you help me out with this? Is there a way to find the location for these (and the other) data sources? I assume maybe someone moved or deleted these files, or something happened with the OneDrive account that holds them.
Thanks in advance!