If you are unable to connect to the VDI after updating the OS, please take the following steps and check if you can connect to the VDI.

<step>
1) Clear your browser's cache.
<ex:>
(Google Chrome) Clear cache & cookies
https://support.google.com/accounts/answer/32050?co=GENIE.Platform%3DDesktop&hl=en

(Firefox)How to clear the Firefox cache
https://support.mozilla.org/en-US/kb/how-clear-firefox-cache

(Safari) Clear your browsing history in Safari on Mac
https://support.apple.com/guide/safari/clear-your-browsing-history-sfri47acf5d6/mac

2) Try to connect to the VDI using a different browser.
<ex:>
Google Chrome, Firefox, etc.