For those of us with NO erro PLUS or Secure subscriptions, just operating with the eero base router, they provided these steps to clear up these issues accessing/loading various websites from computers and mobile device apps. This worked for me. Not sure whether this also helps those with eero subscriptions to Plus or Secure. 

Please follow the steps exactly:

1. Power off both the GWE eero and the modem
2. Wait 3 minutes *
3. Swap the Ethernet port on the eero
4. Power on ONLY the modem
5. Wait until it's online
6. Power on the eero 
7. Reboot the device with which you were trying to access PayPal (or whatever site has the problem) and try again.

* Make sure you wait the 3 minutes.

I am having a similar yet somewhat different problem.  I replaced outdated router equipment with Eero 6 recently and my outdoor Wi-Fi security cameras began to function intermittently.  The 1.5 year old cameras were supported by an extender, but the eero provides robust signal strength in the area of the the Edimax Technology cameras (marketed by Honeywell).  To correct the camera connection issue, the extender was removed and the cameras reset.   The cameras successfully join the eero network.  After successful connection the camera initiates a registration process with the Edimax servers. The registration process repeatedly (always) times out.  Working with Edimax Technology tech support several work arounds were attempted including temporarily suspending 5G service and registration through a guest network.  The work arounds failed.  Eero tech was then contacted and after sometime between the security company tech and eero tech about sub-mask and other issues, the eero tech acknowledged (after consultation with other Eero tech team members) a known Eero communication problem with Edimax Technolgy cameras.  The ultimate recommendation was and camera replacement with Netgear products.  Not a good suggestion from the perspective of the security company that supports many Edimax Technology cameras or the customers perspective who now must choose to replace the home network router system or the security camera system to secure the full array of desired service.  Buyer beware, Eero does not communicate with Edimax Technology Wi-Fi cameras.

I just created an account only to say that I canceled my eeroPlus subscription this morning due to this issue. I have been fighting with issues on a couple of major websites the last couple of weeks and in an act of desperation this morning, I tethered with my phone instead of using wifi, and behold, all of the issues went away! To further test that it was my eeroPlus subscription causing the issues, I disabled the "advanced security" feature and everything worked fine after that.

As a final data point that I made the correct decision of canceling my subscription, I received a 502 bad gateway error when going through the workflow on account.eero.com to cancel my subscription. I forgot that I had reenabled the advanced security feature during my testing, so after disabling it again, I was able to successfully cancel the subscription. It's absolutely pathetic that the flagship feature of your subscription service is breaking functionality ON YOUR OWN DOMAIN.

i need access to roblox.com my eero is not working