Welcome! This forum has a treasure trove of great info – Scouters helping Scouters! Just a heads up, though - all content, information, and opinions shared on this forum are those of the author, not the BSA.
That is just a (now somewhat old) informational message letting folks know that, if they have a pending advancement upload file, they need to delete it and restart the upload. For a while, there was an active problem that was impacting new uploads, but that was resolved some time ago. The warning message hasn’t yet been taken down. I’m assuming that’s because some units still have pending uploads from that time period, but that’s strictly an assumption.
If you unit is using Scoutbook you do not need to use IA to process advancement reports. Use the Needs Purchasing report in Scoutbook, create a Purchase Order and generate the advancement report from there.
My advancement chair is having problems seeing all the approved advancements too. I’ve tried to change her connections and it never changes even when it says updated. This program is the pits. More problems that it is helpful!