[Plugin: Updraft] Not backing up database

I’m trying to get this plugin to work, and my goal is to save the backup online (ie the /wp-content/updraft/-folder). The problem is that the sql-file never contains any real information, just a short description but never anything about tables and stuff like that. The file is about 150 byte. Everything else seems to work fine. Any qlues what could de the cause for this?

https://www.ads-software.com/extend/plugins/updraft/