Error occurred loading the document: TypeError: Cannot read property 'Resource' of null

[alexeyOnGitHub]

I'm opening an MSP xml file created by my own app (not by MSP).
popup is shown by this viewer:

Error occurred loading the document: TypeError: Cannot read property 'Resource' of null

now, I admit that the resources section is properly not filled out correctly yet (I'm experimenting with a new version of my app that creates MSP xml files and resources section is most likely not processed properly at the moment), but it would be nice if NULL/undefined Resources did not prevent loading for the rest of the file.
sample problem file: https://gist.github.com/alexeyOnGitHub/5f6ad9b532bec5d96b59f1e03f0c5889

[saf001]

I'm not sure if this is the same problem that I had (open XML file located on the http server), but the fix for me was to replace loadFromDom with loadFromXml in the handleHttpOpen function.