Anyone help me to tell why this is happen to me?
Does your user have permission to access Imp/Exp?
yes I have permissions to access import/export tool. I already export items so many times but from last day dont show doctype and file-type. Whats the possible error regarding this issue and how to solve it?
You might need to do
bench --site your-site-name clear-cache
Problem is resolved. Thanks man you are so genius again thanks