Bad PDF unsupported font error when trying to create PDF Form

I've saved a .docx to .pdf, and am now trying to create a PDF Form.  I've used this same document in the past that worked just fine, and the only change I've made is to text information in the original doc.  I've confirmed that all the fonts I am using are TrueType fonts, but I am receive this error.

Acrobat was unable to make this document accessible because of the following error:

Bad PDF; error in processing fonts. <unsupported Type2 font> [1]

Please note that some pages of this document may have been changed. Because of this failure, you are advised to not save these changes.

What's gone wrong, and can anyone help me fix it?

TIA!