AWS Cloud9 - "Fail to write" error while saving code

Hi,

I have an Cloud9 environment which was working fine until today when I tried to save my code, and I have got this error:

Failed to write to 'custom_fields.csv' final.to_csv(s3_csv_url,index = False) print('\nNumber of results found: %s. Upload to S3 done' % response['totalResultSetSize']) print(len(final)) if __name__ == '__main__': main(ad_manager_client)'. [object Object].

This happen for every files in my ide, nothing has changed since yesterday. Thanks for any insights.