I've been trying Tableau Prep to help me clean & group some product brands, instead of doing it manually with sentences like group by brand where brand like '%something%' .. So this is pretty basic, Prep is giving me an error when selecting one of these two choices group by pronunciation or common characters.
I've attached a simple flow (with an hyper file, the image shows a live connection to my DB) so that you can help me understand why is this happening. I've also searched some solutions or guidance about this specific error but as we know Prep y relatively new and I didn't find any help.
Sorry that this isn't working for you, but thanks for sending along the .tflx. I was able to try it out and repro the issue. I've filed a bug for the team to dig into.