Updating to version 25.12 looks to have removed the dependency on Aspose.Drawing and Aspose.Drawing.Common - causing failures when converting image and visio file types.
GroupDocs.Conversion.Exceptions.GroupDocsConversi…...GroupDocsConversionE: Could not load file or assembly ‘Aspose.Drawing, Culture=neutral...GroupDocsConversionE: Could not load file or assembly 'Aspose.Drawing…' This is...