Based on your description, I have two questions as below.
- Does this issue occur on specific Visio file or all Visio files?
- Does this issue occur only in Visio or other Office applications like Word?
Generally, if you get the error message saying “Upload blocked”, you may need to remove and reconnect OneDrive.
If it doesn't help, you could try to reset OneDrive.
As said in this document, "Resetting Microsoft OneDrive can sometimes resolve sync issues and resets all OneDrive settings. OneDrive will perform a full sync after the reset.
You won't lose any data by resetting or uninstalling OneDrive."
Any updates, you could post back.
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