Also had similar issues with dns errors. Did not know what to do and decided to change secure sertificates on my website, I used
www.ssls.com and its helped a lot. Now I do not have problems with dns servers.
The owner of website do not need to forget about secure certs. Certificates are divided into groups based on the type of verification, the number of domains and subdomains, browser trust, and brand. I am user of comodo ssl
If you have Mac you can spell this vpn for mac https://veepn.com/ because I need often use vpn for watching youtube and social media. Because during traveling some websites and social media are banned.