Summary
When Quick Fields Agent attempts to run a scheduled session that contains a Form Extractor process, you may receive the following error message for each page:
unknown internal error
The session runs without errors if you run it manually from Quick Fields.
Resolution
There is a hotfix available for Quick Fields 7.1.2. The fix is an updated version of QFContainer.exe (version 7.1.2.3).
To update Quick Fields 7.1.2