
Based on your description, I have some questions as below.
- Do you mean that this occur on every diagram type like Wireframe Diagram?
- Can you see stencils before?
If yes, do you have any operations recently like updating? - What's the version of your Visio?
You could go to File>Account>Product Information>About Visio to check the version. - Can you "Click the More Shapes menu above to browse shape categories and open stencils" successfully?
Any updates, please let me know.
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