Thank you so much for sharing that link. I've checked every public server so far on SSL Checker, and of the ones that return results, they all show a missing root certificate. I will definitely migrate to my own Bitcoin Core node.

Is my sparrow wallet at all compromised for having connected to public servers in the past? If so, is there anything I can do to ensure my funds don't get stolen via man in the middle attack once I set up my own node? (i.e. delete and reinstall Sparrow) Currently I have the most air gapped solution where my cold storage hasn't once been connected to my laptop at any point. Thank you for the help!

Got it, thank you for checking with Firefox. Is there a rule of thumb for which public servers are safe to go with? If I run my own bitcoin node, will my sparrow wallet still be compromised from connecting to public servers in the past?

Thank you!

Thank you for clarifying. I likely did receive the popup due to connecting to a new server as you mentioned.

A few questions for you:

• How were you able to verify this server is managed by openoms?
  
• How do you know it's still safe to connect to? I ask because after checking this server on sslchecker.com it appears this server's root certificate is missing which was flagged as a red flag by others who responded to my post.
  

Thank you for all the help!

Sometimes I have VPN turned on. I do not own electrum.diynodes.com and have never heard of it until the popup that I received. I am currently not running my own instance of an Electrum server but am planning on running my own Bitcoin Core node after this incident. When you say I need to enable SSL on the settings or provide server certificate, this is relevant if I run my own private Electrum server but does not apply if I'm running my own Bitcoin Core node, right? Thank you for sharing the GitHub page. I will report the issue.

When I open Sparrow, I receive a popup titled "SSL Handshake Failed". The message says "The certificate provided by the server at electrum.diynodes.com appears to have changed. This may be simply due to a certificate renewal, or it may indicate a man-in-the-middle attack. Do you still want to proceed?".

Has anyone else gotten this? Is it safe to click Yes and proceed? Is it safe to connect my cold storage to my computer and/or conduct a transaction? Thank you in advance