maixpy throwing a value error when loading a kmodel

Hi all,
I am using a maixduino for image classification on one of the tflite models which has been converted to kmodel. Size of the Kmodel is 2.2MB, and i tried to load the model from sd card attached to the mcu.
However, there is an error when using this line:
task = kpu.load(“classification.kmodel”)
ValueError: b>>>

What does the error mean?

Some more details about the board:
Firmware - maixpy_v0.4.0_50_gcafae9d.bin
Maixpy IDE -
OS used - Ubuntu 16.04

Thanks in advance!