Fody is only supported on MSBuild 16 and above. Current version: 15

Question

Please downgrade Fody to version 4.2.1.

For what it's worth - I ran into the same situation. A colleague added Fody with no other reason than to reduce the number of files created upon building.

Rather than deal with downgrading plugin versions or upgrading VS2017 to VS2019, I removed Fody from the project (as it had no real added value in the project).

Upgrade to Visual Studio 2019 https://visualstudio.microsoft.com/downloads/