How can I add files to stock items?
OneDrive Wrong Host error
Do you use a personal OneDrive or OneDrive for Business?
If it is OneDrive for Business, then this issue can be caused by OneDrive account permissions. According to OneDrive documentation:
"Note: You can only get shareable links for files in OneDrive for Business if the user's tenant admin has enabled external sharing."
So, please check these permissions yourself, or ask your OneDrive's administrator to check if external sharing is enabled at https://admin.onedrive.com/?v=SharingSettings.