Unable to access website on WIFI. Must use VPN or cable connection

This began happening about a week ago. Intermittently my web site drops. It’s up and then it’s down.
Now I can see the site but only if I access thru my VPN. Also can’t view my site over my wi-fi. Only a cabled connection. This is mostly happening at my local office only. I can access the site elsewhere, most of the time.

The error I receive in Google Chrome is: DNS_PROBE_FINISHED_NXDOMAIN

There’s nothing controversial about the site so no reason to be blocked.

When I run the CloudFlare diag I get all clear except:
no_dnssec_found
The site does not have any DNSSEC records.

and
www_does_not_resolve
No, Cloudflare DNS could not connect to ‘www.domain.com’.
Add missing DNS records

NOTE: I also get the same errors on another site that was down but now seems to be ok.
I have updated the DNS on both sites and installed a new SSL on the one in question.

What do you think?
Thank you for your feedback by the way

Due to a recent change in the domain nameservers or possibly missing some DNS record at the DNS tab of Cloudflare dashboard?

Have already looked into the below related article?:

Restarting router seems to not solve the issue at all?

May I ask what is your domain name?

I have replaced the router and modem from my ISP, yes.
my site: lweconsulting.com

Also note, I only used the CloudFlare diag tester.
I host elsewhere
Thank you

That domain is not using Cloudflare name servers. It’s using GoDaddy name servers and points to a GoDaddy IP address.

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