Have you enabled jasshelper? Open the trigger editor > jasshelper > enable jasshelper
EDIT: Posting the map made it very easy to find the error. You have a global variable called TimerSummoning that is currently a timer variable but its used by a few actions as a real variable (ex: obelisk01,02,03,04 Timer Arthas). I am not quite sure how you managed to do this. Id be interested to know how you think you did that.
If you read the window with problems that appear you might be able to suss out problems yourself. The error says: Cannot convert timer to real in parameter callout StartTimerBJ, Cannot convert real to timer. The surrounding text of the highlighted text can show where and which trigger is responsible.