I'm pretty new to Roll20, so this is probably operator error. I've created two rollable tables, one for a shapeshifting NPC, one one for an NPC with invisibility using keithcurtis's invisible tokens trick. The shapeshifter table tokenizes fine, but when I click on the token button next to the inivisible NPCs table, nothing happens. I then created a 3rd rollable table with the same two icons (NPC image and Keith's invisible pixel), and that one worked fine. The settings on all three tables (other than the names of the tables and items and the actual images used) are the same.