Hi! Could you please check selected file type to Upload in Settings panel and connected data type - it should be the same. Please provide site and defined page with Upload button to reproduce an issue.
Hi!
I believe that WIX fixed it because now it’s working and I did not do anything.
This post is practically the same.
https://www.wix.com/velo/forum/coding-with-velo/warning-startupload-is-deprecated
I’m checking all nmy site to be sure of it.
Thanks a lot for your help!