ValueError: Tensor Tensor("activation_5/Softmax:0", shape=(?, 2), dtype=float32) is not an element of this graph

There seem to be an issue with predicting using my keras model. I had trained it using the following keras code:

model = Sequential()
model.add(Conv2D(32, (3, 3), input_shape=(150, 150,3),padding='same'))
model.add(Activation('relu'))
model.add(MaxPooling2D(pool_size=(2, 2),padding='same'))

model.add(Conv2D(32, (3, 3),padding='same'))
model.add(Activation('relu'))
model.add(MaxPooling2D(pool_size=(2, 2),padding='same'))

model.add(Conv2D(64, (3, 3),padding='same'))
model.add(Activation('relu'))
model.add(MaxPooling2D(pool_size=(2, 2),padding='same'))

model.add(Flatten())  # this converts our 3D feature maps to 1D feature vectors
model.add(Dense(64))
model.add(Activation('relu'))
model.add(Dropout(0.5))
model.add(Dense(2))
model.add(Activation('softmax'))

model.compile(loss='binary_crossentropy',
          optimizer='rmsprop',
          metrics=['accuracy'])

However when i predict it on my local system after training with the shape (1,150,150,3) . It predicts accurately with an accuracy over 90%. however when i load my model on my raspberry pi and input the image of the same shape (1,150,150,3) it returns an error. Below is the code loaded on the raspberry pi to predict from the keras model.

    data = numpy.fromstring(stream.getvalue() , dtype = numpy.uint8)
    image5 = cv.imdecode(data , 1)
    print(image5.shape)
    #cv.imwrite('uhhu.png',image5)
    img = cv.resize(image5,(150,150))
    x = img_to_array(img)
    x = x.reshape((1,) + x.shape)
    x = x/255
    x = numpy.float32(x)
    print(x.shape)
    score = loaded_model.predict(x)
    print(score)