It appears that your node configuration is attempting to pull the 32-bit version of the SDK which we do not support:
The link that gives a 404:
https://www.pdftron.com/downloads/PDFNetNode/9.4.0/pdfnet-addon-v9.4.0-node-v93-win32-ia32.tar.gz
Expected link (which is supported):
https://www.pdftron.com/downloads/PDFNetNode/9.4.0/pdfnet-addon-v9.4.0-node-v93-win32-x64.tar.gz
Please double check your configuration and make sure it is pulling the 64 bit version of the SDK.