Putty network fatal error: Connection timed out

I downloaded putty and connected it with aws ec2 a few days ago. I installed a lot of important data as well. But recently I am not able to connect to putty. How can I bring back the connection to putty without the loss of data? Also, I saw that the status check on ec2 management console is showing the error 1/2 checks passed and it is also showing that there is an error in instance status checks. Restarting the laptop also doesn’t work. What should I do so that my data is not lost and putty also starts working again??