Safari blocking a specific page on SWAiir by default

I tested the site and all dropdown options opened properly.

Go step by step and test.

Restart your Mac.

    Launch Safari holding the shift key down and test.

2 Startup in  safe mode to try to isolate the cause of the issue.

• Select your account and login.
• Test.

    To leave Safe Mode, click Apple logo   in the menu bar and choose “Restart”.

     https://support.apple.com/en-us/HT20126

     Test the site again

3. Try Private browsing

     https://support.apple.com/en-us/HT204098

4.If Safari doesn't open https://support.apple.com/guide/safari/manage-cookies-and-website-data-sfri11471/mac

5. Clear all website data

    https://support.apple.com/guide/safari/manage-cookies-and-website-data-sfri11471/mac