How do I reinstall a factory app that is glitching on my Alcatel Fierce xl windows 10 phone?

magenta4074165

    How do I reinstall a factory app that is glitching on my Alcatel Fierce xl windows 10 phone?  One note is not showing pdfs after a recent update, but  a white box with a red x.  I was told that I needed to reinstall it, but the reinstall button is grayed out on my phone since it is a preinstalled factory app.  Any suggestions?

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