I'm having this exact same problem. The field with a space is listed as a field and that works fine. When I list the field as a groupby I get an error: DA0057: An alias list was provided but it could not be parsed.

@leeloo_dallas The wrench icon has been replaced with the "three dots" icon in the top-right corner. You can find the option to cancel in there.

It would seem that some beast modes that generate HTML can be used as a summary number, but I also don't see the option to do so. See "Formatting a Summary Number" https://knowledge.domo.com/Visualize/Adding_Cards_to_Domo/KPI_Cards/Transforming_Data_Using_Beast_Mode/Sample_Beast_Mode_Calculations%3A_Card_Element_Transforms