What steps should I take when I can’t delete a document in a subsite in SharePoint?

1. Check the user’s permissions: Confirm that the user has sufficient permissions to delete documents from the subsite.
2. Run the Repair script: Make sure to run the latest repair script to check the subsite’s integrity.
3. Elevate user’s permissions: Ttest to see if the issue can be resolved by elevating the user’s permissions.
4. Take ownership of the document: If all else fails, take ownership of the document and delete it manually.