Google Colab Crash When Loading Pre-Trained Transformer

I am new to transformers. I have fine-tuned my MT5 model in Google Colab and saved it with save_pretrained(PATH). However, when I tried to load the model with MT5ForConditionalGeneration.from_pretrained(PATH), Google Colab keep crashing with log error:

terminate called after throwing an instance of 'std::__ios_failure'

what(): basic_filebuf::underflow error reading the file: iostream error

I suspect that it was out-of-memory problem, but I have no clue how to fix it.