Invalid character error when using mongoimport

Hello, I was looking for ways to get a complete dump of the metadata in CrossRef and came across this useful project.

I've tried importing [your dump file ](https://figshare.com/articles/Metadata_for_all_DOIs_in_Crossref_JSON_MongoDB_exports_of_all_works_from_the_Crossref_API/4816720/1) as well as the one archived by [Bryan Newbold](https://archive.org/download/crossref_doi_dump_201809), but I've come across the following error:

After running this command to import the file (using Windows 10 Pro):

mongoimport --db crossref-mongo --collection works --file "C:\path\to\file\crossrefworks.json.xz"

I get the error:

Failed: error processing document #1: invalid character 'ý' looking for beginning of value
imported 0 documents

I get the same error when I try importing Bryan Newbold's dump file.

It's the first time I'm using MongoDB so I don't know if I'm doing something wrong. I realise this is not strictly an error with the code in this project, but I thought you might be able to know what's going on with these dump files. Any help would be much appreciated.