I have seen other posts with this issue and attempted to follow the advice given in them, but to no avail. I made sure to update my Survey123 Connect version today (4/28/2021) to the most recent version. I have a huge file/survey. It works how I want it to within Connect but will not publish; I keep getting the 499 error code about a "Gateway Time-out". I have an external choices tab, as most of my surveys do due to the amount of information in them. I cannot figure out the work-around to this error. Apologies for the duplication of questioning when this is brought up enough as it is.
Thanks for your time.