I took a quick look at this, it does not appear that gate fee occurs in the codebase of the referenced project https://github.com/bitshares/bitshares-core, reading the docs and searching the code, I found the GUI is here https://github.com/bitshares/bitshares-ui so I went ahead and made a bug report https://github.com/bitshares/bitshares-ui/issues/765. I see you are using chrome, can you please try creating a temp profile with chromium --temp-profile on the comand line https://superuser.com/questions/377186/how-do-i-start-chrome-using-a-specified-user-profile#377195 , also try firefox and other browsers if you can with no profile.