Cant convert .dxf files

Hello, I tires to convert .DXF files to PDF as follows:
create the container:
docker run -p 9080:80 -v /data:/data --name conversion_cloud groupdocs/conversion-cloud

with the attached DXF files, but got “internalError”, with “Object reference not set to an instance of an object.”. the same approach worked with other files types.
thanks.
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This topic has been moved to the related forum: DXF to PDF Conversion in GroupDocs.Conversion Cloud Docker throws internalError - Free Support Forum - groupdocs.cloud