Error installing version 8.8.x "Could not load file or assembly"

Question

What if you get the following error when installing version 8.8.x?

Could not load file or assembly 'Serilog.Filters.Expressions, Version=2.1.0.0, ...

Answer

The error may occur when running version 8.8.x if version 7.x.x was once installed on the server.

You need to find the file "Serilog.Filters.Expressions.dll" in Infoport version 8.8.x and delete it.