Last tested: May 4, 2020
Does the Look title have a
% character in it?
When a Look containing a % character in its title (let's call it "% Look"), where if the % were interpreted as a wildcard, the Look's name would match an existing Look (let's call it "named Look"), the % Look cannot have edits to it saved, as the save button will not activate on the % Look unless the title is changed, or the name of the named Look is changed to not wildcard match the % Look.
Edit the Look's title to not match another Look, such as removing the percent symbol, or adding additional characters to the Look's name. (as an example, updating "Waitlist Funnel (%)" to "Waitlist Funnel (percent)" or "Waitlist Funnel - (%)".