I think I have the same problem. I am trying to create a bar chart of clients by revenue sum, and I cannot get it to generate - I get the “internal error, try refreshing” message in place of the chart, but no matter how many times I refresh it won’t load. The minute I change it to a pie chart, it’s fine.
Strangely, I have another base I have generated a view for which has currency values I have successfully bar charted. I’ll try to do some comparison and see why one might be working and another not. Could be me doing something wrong at this rate.
No, I think mine is a different root cause, because my revenue field is not formatted as currency or with any currency symbol. It’s actually a computed formula field, maybe that’s contributing somehow?