Oblex Spawn token Not working

I recently purchased Mordenkainen's Tome of Foes and I am experiencing an issue where neither of the Oblex Spawn(not sure why there are 2) compendium entries work correctly. When I click the name and drag them to the map I just get a generic icon instead of their token and when I shift double click them it just leads to a blank character sheet. The sheet looks more like a PC sheet than a monster sheet, but it is blank. The other two Oblex entries (adult and elder) seem to work properly. Any suggestions or is this just something that needs to be fixed by roll20?

It is a very recent bug that the devs are working to fix. There are several threads on this.

Hello Charlie, As keithcurtis stated, this is a known issue and is currently being worked on by the devs.  Please provide the following information to the  consolidated thread here : 1) The character sheet you are using 2) A list of monsters/NPCs you have attempted to Drag and Drop 3) Console log capturing the action of dropping the monster/NPC onto the sheet As such, I am going to close this thread. Please follow that  consolidated thread for updates .  Thanks!