is anyone else's reading lists just gone?

I logged into my account after a month only to see that my lists are gone. like literally. all the ' I want to read ' and ' I'm reading ' and ' already read ' lists are gone to ZERO. I've had my account for more than 6 years and it's not the first time I've been away for more than a month, but this has never happened before. How can I get them back? And I found no E-mail to contact the developers of this website. Please help.