If you are seeing garbled text or dots instead of letters due to this font error, try these solutions:
: Some users find success by opening the PDF in a simple viewer like macOS Cidfont-f1 Font
In many documents, CIDFont+F1 is actually a substitute for common fonts like Arial Bold (with F2 often being Arial Regular) or Myriad Pro . If you are seeing garbled text or dots
The Cidfont-f1 font has several use cases: Cidfont-f1 Font