Merge pull request #5738 from WiXSL/fix-savecontext

Improve validation on possible SaveContext error if no context is supplied

Author: djhi

packages/ra-core/src/controller/details/SaveContext.tsx

@@ -52,7 +52,7 @@ export const useSaveContext = <
 ): SaveContextValue => {
     const context = useContext(SaveContext);
 
-    if (!context.save || !context.setOnFailure) {
+    if (!context || !context.save || !context.setOnFailure) {
         /**
          * The element isn't inside a <SaveContextProvider>
          * To avoid breakage in that case, fallback to props