hi @jota, thanks for your reply.tried as you told me, please see the image below to identify the error.
hi @jota, Issue solved. I was trying to obtain new certificate without stopping apache..so when server(lets encrypt) reaches domain.. it encountered old certificate...so was showing invalid response.( I think this might be the reason).when did by stopping apache...it responded with certificate.now it is working with both www and non www domains in both browsers.thanks and regardsdrsnehal79
Perfect @drsnehal79. Thank you for letting us know it and enjoy your site
I proceed to close this ticket as solved. If you have any other questions, please do not hesitate to open a new thread.