My app is working fine with the Heroku0-20 stack, but when I upgrade to stack 22, I get "No usable version of libssl was found". I am using .NET Core 5, and it likely means I need libssl.
How can I install it on the Heroku dyno?
Ubuntu 22.04 (Focal) - what the Heroku-22 stack is based off - upgraded to OpenSSL 3.0 which is not supported by .net 5. You will need to either upgrade .net to some 7.x version (it appears based on GitHub issue details) or install OpenSSL 1.x.y in your stack so its present for your .net program to find it.