Hi, I have a new site with the products Jira Software, Jira Service Management and Confluence (in total only 6 projects, 4 Spaces and 2 users). I used the standard version everywhere. Using the backup manager I want to create a backup of my site. I get the following error message:

What can I do? I can't find any information about this error message anywhere and I'm relatively stumped right now.
Kind regards,
Ben