I created a spreadsheet in Google Sheets several months ago and use the Google Analytics add-on. It has always worked fine until today, now if I try to create a new report, I see this error message: 

> 
> You do not have permission to call showSidebar.
> 
> 
> 

Run Reports shows: 

> 
> You do not have permission to call showModalDialog
> 
> 
> 

Schedule a report shows: 

> 
> You do not have permission to call showModalDialog
> 
> 
> 

I am but a humble AdWords consultant who knows just enough coding to break things. However, in this case, I haven't changed anything. All I did was try to run a report. 

Any help would be greatly appreciated.