Hi @Exmatrix,
This is pretty strange. Can you double-check and ensure that you have the Steam Overlay enabled? As this is required for in-game purchases.
- Open the Steam client
- Click ‘Steam’ in the upper left-hand corner
- Select ‘Settings’
- Select ‘In-Game’ in the sidebar
- Ensure the ‘Enable the Steam Overlay While In-Game’ option is enabled
- Click ‘OK’
- Re-launch Darktide