Manual Template Import Fails with API Linked Coinbase Wallet

My Coinbase account has a new “Advanced Trading” feature enabled. Accointing does not yet properly import these transactions, so as a stop gap I’m trying to manually import the trade data so the improper data being imported via API can be ignored.

Unfortunately the import of the XLSX is failing. The screen says “Great! Your file looks good.” but when you attempt to continue loading the file, the “Loading” icon appears constantly and the process never completes.

Am I doing something wrong?