Character Sheet (D&D 5E by Roll20) not rolling for certain characters

I keep getting the following errors when trying to roll for a couple of characters created with D&D 5E by Roll20 character sheet: For initiative rolls and attack rolls from the character sheet:  "No character was found for 'Claic Rheom 4 '" --  [Claic Rheom 4 is the name, and 4th attempt to build this character]. This shows up 6 times. Perhaps because of the ability scores?? "SyntaxError: Expected "(", ".", "[", "abs(", "ceil(", "d", "floor(", "round(", "t", "{", [ |\t], [+|\-] or [0-9] but "C" found." For saving throws: I don't get a syntax error, just the following text followed by no roll:  "Fox | DM (GM):Claic Rheom 4 | Fox|strength_save_roll" Any ideas what is causing this, and how to fix it?  (Tried doing a search, but didn't find a fix that worked.) Thanks! -Fox

Figured out what was causing the problem. Apparently renaming the player character in the character sheet threw everything off. If I make that blank, rolls occur with no problem.