For anyone still with this problem i managed to fix it by opening urza gatherer desktop app normally on my pc. then press F12 on your keyboard to open up the Developer tools, and then follow the guide bellow posted by David. deleting the cache seemed to be the workaround. but yeah perhaps it would be great to add a small tutorial on how to access the dev tools and remove the cache in the help panel or something if this is a reoccuring problem :)
For anyone still with this problem i managed to fix it by opening urza gatherer desktop app normally on my pc. then press F12 on your keyboard to open up the Developer tools, and then follow the guide bellow posted by David. deleting the cache seemed to be the workaround. but yeah perhaps it would be great to add a small tutorial on how to access the dev tools and remove the cache in the help panel or something if this is a reoccuring problem :)