Log out of Avianis.
2. Click on the 3 dots in the Upper Right Corner > More Tools > Clear browsing data *Note you can utilize Ctrl + Shift + Del as a shortcut to access Clear browsing data
3. Clear your entire browsing history, data, and cache
4. Close your browser
5. Open a new browser
6. Log into Avianis and try again
For more on clearing cache, refer to this guide.