Symptoms

In some cases, you can face the issue when data from the documents can't be recognized and shown as dots. 
Example:

Cause

Such behavior can be faced when some fonts from the document are missing from the processing station machine.

Resolution

To fix this issue you need to download fonts and put them into C:\Windows\Fonts directory.
You can find fonts here - https://docs.microsoft.com/en-us/typography/fonts/