LinkStack is unable to create backups

[takouhai]

Describe the bug

LinkStack is unable to create backups, instead throwing a 500

Context

• Hardware: A 4GB RAM KVM VPS on Racknerd
• YunoHost version: 11.2.31
• I have access to my server: through SSH + through the webadmin
• Are you in a special context or did you perform some particular tweaking on your YunoHost instance?: no
• Using package version/branch: 4.8.0~ynh1

Steps to reproduce

1. Open the web panel @ /admin/config#3
2. Click on "Backup Instance"
3. Wait for /backup?backup to show up
4. Get a 500 error

Expected behavior

• A backup should be created and not throw a 500 error

Logs

I'm not sure where to look for logs, but if you direct me to where they might be I can try and wrangle them. I didn't find any relevant information in the Services tab.