Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Unfortunately, there is not much I can do in this situation. OneDrive is a cloud service, and when you try to establish a connection from your device to the OneDrive servers, it recognizes that your device is running Windows 7, which Microsoft has blocked from connecting. I do not have the ability to bypass Microsoft's restrictions to allow your device to connect to OneDrive.
Regarding the lack of a prompt message for this issue, I don't have the authority to participate in the design and development of OneDrive. I can only attempt to contact the development team and suggest they add such a notification.
Since OneDrive fundamentally refuses to connect with Windows 7 from the server side, my recommendation would be to upgrade to a device that supports Windows 10 or later. Aside from this, I don't have any other suggestions.
Thomas