Pos Awesome blank screen ERPNext v15

Getting blank screen on posawesome after installation and following all steps

Whenever I get blank screen (or partially formatted) the following commands usually fix the issue:

bench update
bench migrate
bench build
sudo chmod o+rx $HOME

$home is for user or root user?

l have just tried all these commands but still getting blank screen , l was also checking on erpnext market place it looks like it does not have v15 on posawesome

Here is the stable version of pos awesome for erpnext version 15