502 bad gateway nginx gunicorn फ्लास्क जब फ़ाइल अपलोड

502 bad gateway nginx gunicorn फ्लास्क जब फ़ाइल अपलोड

#Check if the gunicorn has write access to the folder you want to add 
#the file. If it doesn't have, then use
chmod -R 777 the_folder_you_want_to_write_to