the error should be logged there. I’ve seen people reporting different logs for this error, one of them is backend fail or something like this, which was related to the firewall blocking the traffic
I got the same error. Turns out it was because I was blocking all traffic from the US and UK. Allowing those two country’s in Cloudflare fixed the issue for me.
2 Likes
Glad it’s working 
btw: If you’re using the service account for syncing, it also requires the UK to be reachable.
Edit: Or allow Google AS15169
1 Like
ciao , hai fatto solo queste modifiche , ho hai fatto tutta la procedura ?
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Hi I followed your post’s instructions, but when relinking Home Assistant to Google Home I keep getting
Could not reach [test] Home Assistant v2. Please
try again.
in Google Home.
I already tried rebooting Home Assistant and relinking, but I always end with this.
Any idea what to do? 
Hi everyone, I’ve been having the same problem for any days, I’m trying everything but I always get the same error: Could not reach [test] Home Assistant.
Any good souls to help us?
Hi everyone,
I have lot of disconnect issues with google home past days. Today i have made the decision to delete everything and do the manual setup again.
Unfortunally I can’t connect to the [test]homeapi anymore. After the home assistant login screen I get the: Could not reach [test]homeapi, please try again later.
I have double checked everything and I can’t find weird log messages.
Maybe there are problems with google or duckdns, I don’t know.
I am hoping someone has a fix.
1 Like
I was facing the same problem, but in my case it was just the testing execution of the Google Actions app that wasn’t running.
I guess Google stops the execution of the test instance now and then.
EIDT: well, it seems I talked too soon. The app was in fact not running, but although my Google Home seemed to be able to connect, I still have all devices offline.
And it doesn’t seem to be a matter of not being able to access my HASSIO instance, because if I try to reconnect to the linked device ([test] my homeapp), Google Home says that it can’t connect right now.
My Google Home is now up and running. Nothing has changed, I tried again this morning and everything works now. I suspect there was a problem with duckdns, Google Assistant or Google Home. I hope everything will work stable from now on.
It seems Duckdns had issues yesterday and is working fine again now for me.
Yep, same here, but the awkward thing is that I had no problem reaching my HASSIO from an external network, that’s why I initially ruled out any problems with Duckdns.
I had no issues with my external connection either, but have learnt over the years of messing with stuff like this this, that if something stops working wait a day or 2 before investigating as it will likely come back, or a fix will be published.
2 Likes
Any update for this issue? Still not working for me.
@ngankl79 most of us got it fixed by latest Home Assistant updates.
If that is not your case then use what another user did (saw it on GitHub).
Create a new Google project from scratch.
I know it suxx, but it worked.
I just created a new google project from scratch and still got the same result where the [test]HA can’t be reached… I added the description, the logo, the privacy doc… Nothing helps…
If you follow the instructions of the Google Assistant integration step-by-step thoroughly it HAS to work.
I just found out there was a region rule on my cloudflare configuration that blocked the traffic from Google. Solved allowing it from there!
what is supposed to come up if we go to those pages? I am having problems trying to troubleshoot getting this setup.
I just found this solution today.
The solution doesn’t work immediately.
Is it possible that Google first checks the application before releasing it? I got the following answer.
_
project-id submitted for review
Version 1 of project-id has been submitted for review for Closed Beta by [email protected], and will be evaluated according to our guidelines.
This process can take up to 3 business days. You shall receive an email once the review is complete. Actions with specific complex features (Smart home setup, transactions including both physical and digital transactions, reservations, account linking, and banking) go through a more extensive set of verifications, which may take longer to complete. You can also track the status of your review in the Actions Console.
Thanks,
The Actions on Google Team
_
The description still doesn’t mention these points. I searched and searched until I found your solution.
Thank you