Hi @umarless,
Your erpnext is in develop branch. so you should install the POS Awesome with develop branch.
Uninstall for apply the command:
bench --site [your.site.name] uninstall-app posawesome --force --no-backup
If you bench is start then stop it. and apply the command.
bench remove-app posawesome --force
If you want to install posawesome for erpnext develop then apply the command.
bench get-app https://github.com/yrestom/POS-Awesome.git
If you want to install posawesome for erpnext version-14 then apply the command.
bench get-app https://github.com/yrestom/POS-Awesome.git --branch version-14
If you want to install posawesome for erpnext version-13 then apply the command.
bench get-app https://github.com/yrestom/POS-Awesome.git --branch version-13
Then after installing the app on your site.
I hope this helps.
Thank You!