DotVVM.BusinessPack.Export.Excel relies on package
ClosedXML.Signed 0.95.4. This package is deprecated and relies on
System.Drawing.Common which is not supported on non-Windows platform anymore. Exporting excel on linux now results in platform not supported exception.
ClosedXML 0.97.0. This package replaces deprecated
ClosedXML.Signed and in this specific version removes dependency on windows Drawing package (https://github.com/ClosedXML/ClosedXML/releases/tag/0.97.0). For my dockerized environment this was not sufficient, because I had to to overcome one more “Missing font” problem. Solutions are described here: Missing font — ClosedXML 0.102.0 documentation Exporting excel now works as expected for me.