xdgOpenUsePortal: No entry for <mime-type>

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1

I set xdg.portal.xdgOpenUsePortal to true recently to make my browser open Downloads properly when I click on them.

However, I noticed that the files are not opened at all. I am using xdg-desktop-portal-hyprland and xdg-desktop-portal-gtk, I noticed that the user dbus mentions the following error:

‣ Type=error  Endian=l  Flags=1  Version=1 Cookie=17  ReplyCookie=343  Timestamp="Mon 2025-10-20 23:01:18.701481 UTC"
  Sender=:1.301  Destination=:1.248
  ErrorName=org.freedesktop.portal.Error.NotFound  ErrorMessage="No entry for text/csv"
  UniqueName=:1.301
  MESSAGE "s" {
          STRING "No entry for text/csv";
  };

Does anyone have a clue why is that?
I set the default mime type via xdg.mime.defaultApplications and can confirm that it is present in /etc/xdg/mimeapps.list. Why is xdg-permission-store.service not taking into account that mapping?

2

This often happens if the portal got launched before environment variables were imported into the systemd user session, leaving the portal without your user’s software on PATH.

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