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.
I’m not able to make much progress uploading our calendar using a csv file. It gets hung on the first step, “Gathering unit data …”. I let the process run all night. The file only has 10 entries in it, but we have 100 scouts in our troop plus parents. I’ve put a “.” in the description based on something else I read in the forum.
I do notice that the internet advancement tab opens when I run the import.
Its likely that the extension is having a problem talking to SB+ (IA).
The extension requires communication with SB+ and when that message is present for a long time, it means there is a security issue and the extension is not getting a response from SB+, which is running on a completely different system from Scoutbook.
The only thing I can suggest is to log completely out of Scoutbook and SB+ and log back in to see if that resolves the issue. I may be able to set a timeout that indicates the connection has failed