Can't install module via composer if the 'permissionspolicy' module has already been installed as there is a version clash on 'gapple/structured-fields'. Specifically 'permissionspolicy' pulls in v2 of 'gapple/structured-fields' and this module requires v1.
1) install the 'permissionspolicy' via composer
2) attempt to install this module via composer
update the 'require' field in composer.json?
Fixed
2.0
Code