Lost connection to EC2 instance

Question

Can anyone tell me how to fix this?  
Instance i-0c2471f7af8dd9d44 is running (and serving web pages via http on port 8080) but has stopped connecting via ssh - either through the browser console or via putty (console just says there was a problem, and putty times out before checking any credentials or anything)  
=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2020.12.17 01:12:40 =~=~=~=~=~=~=~=~=~=~=~=  
Event Log: Looking up host "52.89.137.160" for SSH connection  
Event Log: Connecting to 52.89.137.160 port 22  
Event Log: We claim version: SSH-2.0-PuTTY_Release_0.74  
Outgoing raw data at 2020-12-17 01:12:40  
  00000000  53 53 48 2d 32 2e 30 2d 50 75 54 54 59 5f 52 65  SSH-2.0-PuTTY_Re  
  00000010  6c 65 61 73 65 5f 30 2e 37 34 0d 0a              lease_0.74..  
Event Log: Failed to connect to 52.89.137.160: Network error: Connection timed out  
Event Log: Network error: Connection timed out

Answer

I had fooloshly applied a Security Group which only allowed SSH from my own IP address --- and then my ISP changed it. Changing the security group solved the problem.

Lost connection to EC2 instance

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