Error code 201 HTML to mhtml converter stopped unexpectedly

I have a error code 201 message when I was trying to convert my both webpages to mhtml format and suddenly it stopped working on behalf basis so it needs to be fixed so that I can convert my both webpages that I download from the internet archive Wayback Machine and once when its fixed I will then start converting my webpages to mhtml format.

@Kainerecycler

Can you please share the sample files and the sample code snippet that you have tried? We will test the scenario in our environment and address it accordingly.