I'm able to access your site just fine. Try using an incognito window or a different device.

thankyou for your reply, but it sometimes open sometimes not, how to access on my device

have you tried another browser?

else have you tried that your system clock isnt drifting?

eg check on time.is is the time accurate, or is it only for your site?

its only for my site, it works sometime and then again same error, i tried another browser, issue persists

do you have any kind of devices between you and the internet that migth be messing with TLS?

Try using a VPN.