CLC2018 not interpolated on a Loire model

Interpolating the layer CLC2018_Dampierre_L93_modifLitMin.shp on a mesh created with the contour ContourMaillage_Loire.shp, in the Interpolation Corine Land Cover plugin, the interpolated mesh has only 0 as coefficients. CLC2018_Dampierre_L93_modifLitMin.shp sent by mail.