504 Error - Core (No outage)
Core can give that error message sometimes if you aren't using chrome .
You can try to resolve the issue by clearing cache and cookies on edge
- Open Microsoft Edge.
- In the upper-right corner of the browser, select Settings and more (Alt+F):
- Select Settings, then click on Privacy & services.
- Under Clear Browsing Data, select Choose what to clear.
- Check Cached images and files and Cookies and other site data, then select Clear now.
- Restart the browser.
Edge can be set to automatically delete cookies every time the Edge browser is closed:
- Open Microsoft Edge.
- In the upper-right corner of the browser, select Settings and more (Alt+F):
- Select Settings, then click on Privacy & services.
- Under Clear Browsing Data, select Choose what to clear every time you close the browser.
- Enable the data that would like to be deleted every time the browser is closed.
If you are on chrome , you can clear the cache and cookies on chrome
- Click the Tools menu (three dotted lines in the upper-right corner).
- Select History.
- Select Clear Browsing Data from the left-hand side. Set the Time Range set to All Time. Check-mark Cookies and other site data and Cached images and files and select Clear Data.
- If on a Windows computer, close and re-open Chrome to save your changes. If on an Apple computer, go to the Chrome menu on the top menu bar and select Quit for the changes to take effect.
If any other browser, please check the link on how to clear cache and cookies
https://its.uiowa.edu/support/article/719