XFoil-related Errors When Using Flow5's Differential Method in BL_solver

During the process of watching and copying the flow5 youtube, in the 2D shape of airfoil.
“The requested analysis is not supported: XFoil is not part of flow5” error occurred.
I want to use Flow5’s Differential method instead of XFoil in BL_solver, but I keep getting XFOIL related errors.
 

The requested analysis is not supported: XFoil is not part of flow5

The foils and their polar data have been saved to the file C:/Users/user/AppData/Local/Temp\_tmp.xfl

Deleting current project
   Deleting 2d objects
   Deleting plane objects
   Deleting sail objects
   Done deleting objects

Successfully loaded Foil_1
Deleting current project
   Deleting 2d objects
   Deleting plane objects
   Deleting sail objects
   Done deleting objects

Successfully loaded Foil_1
Setting planes, polars and operating points... done

The requested analysis is not supported: XFoil is not part of flow5

Imported foil and polar data from project file _tmp.xfl

The foils and their polar data have been saved to the file C:/Users/user/AppData/Local/Temp\_tmp.xfl


Saving project C:/Users/user/OneDrive/document/mail/foil_khs/asdfafdsa.fl5
   Saving project meta-data
   Saving 2d objects
      Saving 2 foils
      Saving 1 foil polars
      Preference option: Not saving the foil operating points
   Saving 3d plane objects
      Saving 0 planes
      Saving 0 plane polars
      Saving 0 external plane polars
      Saving 0 plane operating points
Saving settings

The project asdfafdsa has been saved

Could not open the file C:/Users/user/AppData/Local/Temp\asdf.xfl

The foils and their polar data have been saved to the file C:/Users/user/AppData/Local/Temp\asdf.xfl

Imported foil and polar data from project file asdf.xfl

The requested analysis is not supported: XFoil is not part of flow5