How to stop popup bad/BBox each time I open app?

[Strgzr]

Adobe Acrobat reader shows this each time I open it: "the font 'AAAAAA+NullCFL-Light' contains a bad/BBox." How to stop this popping up?

[Kristeen22886225ktfr]

My Mac and my associates Mac's as well, we all have Adobe Cloud with Acrobat PRo, and today all have been getting this message and PDF won't populate the words/fonts, "The font 'XMFIAQ+Arial-BoldItalicMT' contains a bad /BBox". How to fix this???