Tried out the sheet and it seems the sheet doesn't work properly for PC attribute/skill rolls either, as it doesn't seem to update your mods for them. The sheet is based on the DnD5E base sheet, and a quick look on the code at least tells me the author did the work to add the Mass Effect-specific skills in the sheetworkers as well, but considering the sheet is massive, I can't really say what's wrong with it. Based on what I experienced and what you said, it seems the sheet have several bugs that makes it basically unusable. I have a vague memory of someone bringing this up previously, but could be that I'm mixing it up with the reports on the Elder Scrolls 5E sheet. The author haven't touched the sheet in over a year, and isn't a Pro user, so it's unlikely the bugs will be fixed anytime soon to make things work. If I'd do something about this, I'd scrap the sheet ,and just modify the Star Wars 5E sheet to have the right Mass Effect skills, and the result would be much better than the current Mass Effect sheet. Considering the sheet isn't functional, contains massive amount of code, it could contain any number of bugs that need fixing for things to work, so slightly editing the closest resembling 5E sheet to fit Mass Effect is a much more reasonable & realistic amount of work to make things work again. Considering the sheet haven't been edited in over a year, it's quite possible the sheet have actually never functioned and the author just gave after the first fixes didn't do anything. Edit: I sent a PM to the original author and asked if the sheet worked back when it was submitted. (I also reported the thread to be moved to the Character Sheet forum, as bugs on community contributed sheets are talked about there, and isn't something Roll20 directly maintains) Edit2: It seems I interacted with the author back when the sheet was originally submitted.