Hmm. the fact that the DM is not able to do it either points toward a possible corruption of the sheet. Which sheet is your game using? 5e OGL by Roll20? Shaped? Could you please carefully work through these steps of our guide to Solving Technical Issues ? Some of them might be superfluous, but it's best to rule out the prime suspects. Most important is that step 4. Make sure you capture the log after trying to drag and drop a spell. Step 1: Make sure to use the right browser Please check if these issues persist when using both Chrome and Firefox. Step 2: Ensure that there are no extensions/addons interfering with Roll20 Please disable all add-ons/extensions and anti-virus programs. Step 3: Clear your cache If none of the above succeeds, please thoroughly work through Step 4 . (Don't forget the complete Console Log!) Thank you!