Endnote X9 on Catalina - can't create new library or open one (new to Endnote!)

Hi Tony,

Thank you for the incredibly fast response.

I wasn’t aware Endnote doesn’t play nice with iCloud, where all my folders are automatically backed-up on. But it fixed the initial issue, thank you! However, I’ve always had my entire library (hundreds of articles) stored on iCloud because I’m just not disciplined enough to make a regular backup on an external hard drive. What would you advise to be the best way to backup my bibliography online in combination with Endnote?  

Thanks