model.compile(optimizer=SGD(),loss='categorical_crossentropy',metrics=['accuracy'])

model.fit(x_train,y_train,batch_size=64,epochs=5,validation_data=(x_test,y_test))

ValueError:?Error?when?checking?input:?expected?dense_1_input?to?have?2?dimensions,?but?got?array?with?shape?(10000,?784,?10)