A forecast can't be created because the timeline isn't evenly spaced.The dates or numbers in a valid timeline must have a ...

A forecast can't be created because the timeline isn't evenly spaced.The dates or numbers in a valid timeline must have a consistent gap between consecutive points.For example, use consecutive days that are always 7 days apart, or a numerical timeline of consecutive indices.Additionally, make sure your timeline doesn't contain grouping or subtotals.