A Definition file (used for Screen Recogition and Fields Mapping) is included in the FVTerm web.config file, but is not found.
Please check the web.config file and find the line that includes the file in this log entry--perhaps the name is misspelled or the file is missing from the c:\program files\inventu\viewer\definitions folder (substitute "Flynet" for "Inventu" if your server was first installed prior to 2020.