Any thoughts on this error "Failed to download file Build/game.data.br. Loading web pages via a file:// URL without a web server is not supported by this browser. Please use a local development web server to host Unity content, or use the Unity Build and Run option", first time uploading webgl but got error. I know jam is over and can't edit files but thoughts on how to counter it for no future conflicts?

oh god that happened to me in my first jam you need first to make it with webGl 5 build and after the build is complete you need to  check the files and right click then go to (Send To) and chose (Zipped) then it should upload fine, if that's what you ask about

actually i did the same as you have stated but its still showing an error, when i built a windows build it worked fine, any thoughts?