bug fix

mlmc/src/generators/algorithms/HybridFluxGenerator.cpp

@@ -12,6 +12,7 @@ void HybridFaceNormalFluxGenerator::createPDESolver() {
     pdeSolver = PDESolverCreator().
         WithModel("HybridElliptic").
         WithProblem(problemName).
+        WithQuantity("L2"). // Todo flux error and check?
         Create(meshes);
 }