If you get an error message on your charts that suggests you´ve combined invalid metrics and dimensions, you can either:
Change the combinations in your table eg: you can't combine page metrics and dimensions with post metrics and dimensions
Make sure that the data you are trying to visualize in your tables are from the same sets of data. [Right side of your report on Looker Studio under data properties]
Review our field lists for each of our data sources in our product tab in our home page
Check this article explaining the basics of chart building
Think this is a mistake? Contact support via chat or email (support@portermetrics.com). We'll fix it ASAP.