If you’re in Malaysia and so happened you had similar problem with mine, ie.
- Can’t access to certain websites such as banks etc.
- Can’t access gmail, yahoo and other mails.
- You receive errors such as invalid ssl certificate etc.
- You receive DNS blocked message.
TRY, changing your DNS. I used Unifi and had problem accessing the whole day. To the extent, I wanted to reformat my laptop. Last resort was to change the DNS at it WORKED!
I was using (18.104.22.168 and 22.214.171.124). Now I changed it to 126.96.36.199 and 188.8.131.52
It worked for me, not sure if it works for you. Good Luck!