Did you choose the module when creating the game? Specifically, did you follow these instructions: Curse of Strahd is a Roll20 module. To create a new game based off of the module, click on the Start New Game option from the site menu. The column on the right hand side of the page is titled Optional: Choose a Module . Underneath this are thumbnail tiles for all the various Roll20 modules that are available. For the ones you have purchased, mousing over the thumbnail will make a check mark icon appear over the thumbnail tile. Clicking on the tile will select this module to be used as the base for this new game. Make sure to choose a 5e character sheet, of course.
