If you can't access a website, there is a high possibility that your eero router is blocking it (unusually get Noooo see pic below), eero will be classing the website as not secure.
The blocked website that your trying to access may have been reported for illegal content/malware/phishing etc. and deemed unsecure by the eero company. Only do this if you know what your doing.
If you need to access these un-secure sites on a eero router:
- Open the eero app and login if needed.
- Click on discover
- Click on eero secure
- Click on block & allow sites
- Add your site(s) to the allowed site
- Close your browser then go back on the site and should have access now.
If for any reason you still can't access the blocked website - you can try turning of Advanced Security within the eero app, also check any software on your pc that could be blocking it as well, (such as Norton or MacAfee security etc).
If your using your own router, you shouldn't have any issue, unless your router is blocking it with their own security software.
For further info regarding blocking and allowing websites - https://support.eero.com/hc/en-us/articles/360045634132-Block-Allow-Websites