@Anahaym
Does this issue occur with other stencils?
If there is an option to choose units, please try 'US Units' to create a blank drawing.
Please go to File > Options > Advanced > Scroll down to the bottom, under General section, click "File Locations", check the path of My Shapes.
By default, it should be C:\Users\<User Name>\Documents\My Shapes
. If you have set other paths for templates, stencils, please temporarily remove them for a check
Locate to My Shapes folder and , C:\Program Files or Program Files (x86)\Microsoft Office\root\Office16\Visio Content\1033. Make sure they have same files with .vssx format via copying and pasting.
If the steps above do not work, please go to Control Panel (Large icons View) > Indexing Options > Advanced > File Types tab > At the bottom, select "Index Properties and File Contents" > OK > Rebuild the Index. Please wait some minutes until the process is complete.
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