Views:
Try some of the following to see if you can resolve the issue yourself:
1. From the tenant portal home page refresh your browser a couple of times, login attempting to use "Sign In" found within bar window
 

 

2. Try logging on using a different browser (e.g. Edge, Chrome, even Chrome Incognito)
3. Try logging on from a different device (e.g. mobile, tablet, desktop)

If you are stuck on a "Sign-in Failed" page, try just returning to the tenant portal home page (you can click the Home in Place logo, top left to get there).
 
Please test using Incognito Browser before deciding to proceed with clearing cache/cookies, if Incognito logon is successful then clearing cache/cookies on your normal browser may resolve the issue.
 
4. Enable Cross Site Tracking in Browser settings and clear cache and cookies via your browser/device settings (reference the below guides for more information on how-to)
 
Warning: Clearing cache and cookies may log you out of websites, reset preferences, and slow down loading times temporarily. Backup important data before proceeding. Consider troubleshooting specific issues instead of clearing everything.

Cross-Site Tracking allows websites to follow your activity across different sites. When enabled, this feature lets sites collect data about your browsing habits and interests, which can lead to more personalized ads and content. However, it also means your privacy is reduced, as your browsing activity is visible to more companies.
Some browsers by default, block cross-site tracking for privacy. 

Adjusting the Cross-Site Tracking setting in your browser can affect your privacy. Please consider these implications before making changes.

Reference Guides for Cross Site Tracking Changes 
Safari > Preferences, click Privacy > Deselect "Prevent cross-site tracking.”
Chrome Settings > Click Privacy and security and then Third-party cookies > Turn Send a "Do not track" request with your browsing traffic off

Reference Guides for Device / Browser Cache and Cookies
iPad/iPhone/Mac/Safari: 
 
Windows/Chrome/Edge: