Not enough free space on a newly created vault

I just downloaded cryptomator and I encountered a problem with my encrypted folder on my google drive. When I add an encrypted folder to my google drive windows says that there only is 990 MB of free space on a disk with a total size of 19 GB, even though I didn’t do anything with the folder yet.
Can somebody help me?

I assume you are using WebDAV as volume type.
You are facing this.

I recommend using WinFSP or dokany instead.