We recently made a change in how Glide recognizes row headers. Previously Glide would guess, but sometimes the guess was wrong, and the only thing to do was to change your sheet. Now Glide will interpret frozen rows to mean that the frozen rows are the header. In your About sheet you’ve frozen the header as well as the data row, however, so the data row is interpreted as the header, and the table is empty. Just unfreeze the rows, or use a single frozen row and you should be good.