Hello everyone! I installed ERPNext on a clean ubuntu 16.04 LTS. I used Easy Install and installed develop. When I tried switching to Master, only frappe was switched and got the message :
Branch Master does not Exist in Upstream for ERPNext .
Tried uninstalling erpnext app from development site and install again using this command:
bench get-app erpnext https://github.com/frappe/erpnext --branch master
Check your branch name from the apps/erpnext directory using “git branch”, maybe the branch name is “develop”
Thanks for your response @Pawan . It is now working after the reinstall with the command above.