Dear Synfig Team,
Could you please help me, I have been working on a project for a few days, but suddenly I can not open it anymore. It sais: “Document not well-formed. Line 1 column 1 (fatal): Extra content at the end of the document.”
I have tried to zip it, but after I could not open it with QXmlEdit. (Actually I have never use any XML editor before, I’m not so good in IT…)
I can not upload my project because im a new user… 
Could you please help me?
Thank you,
Lidia
Hi and welcome here 
SIFZ is a compressed SIF file (which is a xml file)
Normally, you first rename the .sifz as .zip and then unzip its content (this one will be editable)
Don’t forget to give us you Synfig and OS version
P.S.: You have a Gmail address, so you could use a Google Drive public link
(see Share a file or folder publicly here) 
I have faced this same problem. Can you help me to solve it?
https://drive.google.com/file/d/1Ea4HDzFr9jwMJdgPJBh5YRHQj_uOBkGZ/view?usp=sharing