Google Chrome
Use a new Incognito window to upload the .aab or .apk (as mentioned in the comments).
Alternatively, clear the website data:
- going to: developer console (F12) > Application > Storage > Clear site data
- Screenshot
- press F5 to refresh the page
- uploading the
.apk/.aabagain
Safari
Open Preferences >
Privacy > Manage Website Data > Remove All > Done