My org is switching everything to Enterprise Portal from Online, and I am working on republishing my Surveys in Portal. Along with this is a need to backload the existing data into the feature layer for the survey once it's in portal. After going to the feature layer for the Survey, I click "Update Data", then choose "Add Data", select the feature layer or table, and click next, then it just shows a blank window with "Update Data" at the top left, with "Back", "Cancel", and "Next" at the bottom. "Next" does nothing. I've tried clearing cache/cookies, incognito, and both Chrome and Edge browsers. I've tried with two different surveys, both with all the edit/update/add options turned on everywhere I can find. I am the owner of the survey. Any advice?