Welcome to the forum, jimer.
When I try to save an event, a error message comes up saying write error unable to open file "" for writing. Can anyone help me out on this? Thanks!
Looks like a missing file.
Which calendar are to using? It's local, offline copy or network one?
Try this: right click -> options... -> calendars
Do you have any calendar(s) in the list? If not, try to add one (but I suppose this isn't the case)
If not, select the calendar you have troubles. Look at the path. It's valid? Check if the file exists.
If none of this works. Check out the Rainlendar's Log