[Ifeffit] error when fitting in Artemis

Hello, I have attached an Artemis project. Upon opening the project, and clicking the fit button the error in the attached log file is generated and the fit is not run. Looking at the history, fits have been run previously without error. The error message indicates Feff may need to be run again, but upon opening the Atoms and Feff window and then clicking on the Feff tab, I see the Run Feff button is grey and cannot be clicked. What steps are necessary in order to run a fit? Thank you, George