Using official linux launcher on Ubuntu 20.04. I was able to work around the issue by linking my Google Chrome swiftshader directory into my minecraft launcher directory:
ln -s /opt/google/chrome/swiftshader /opt/minecraft-launcher/swiftshader
Mikal Houston
Using official linux launcher on Ubuntu 20.04. I was able to work around the issue by linking my Google Chrome swiftshader directory into my minecraft launcher directory: