allure reports not running, although allure is installed - allure command not found

I am using Nightwatch js, and have allure installed, and have been using reports successfully. However, something has changed, and now I get the following error:
$ allure generate ./allure-results --clean && allure open
bash: allure: command not found



I have allure-report folder and allure-results folder. Results folder holds up to date records, but nothing is being written to report folder.


Package.json looks correct - contains references to allure:
{
"name": "automation-poc",
"version": "2.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "./node_modules/.bin/nightwatch --retries 1",
"cleanConfigFiles": "del 'config/*.conf.js'",
"cleanReports": "del 'reports/*'"
},
"author": "Alex",
"license": "ISC",
"dependencies": {
"allure-commandline": "^2.29.0",
"chromedriver": "^94.0.0",
"csvtojson": "^2.0.10",
"del": "^4.1.1",
"del-cli": "^5.0.0",
"nightwatch": "^2.2.3",
"nightwatch-allure": "^1.2.0",
"selenium-server": "^3.141.59",
"uuid": "^10.0.0",
"yargs": "^15.3.1"
}
}



I've run various commands:
npm install allure-commandline
npm install nightwatch-allure
allure generate ./allure-results --clean && allure open
allure --version
npm install -g allure-commandline
npm install -g nightwatch-allure


I've made sure there's an entry in System Variables for the location of \node_modules\allure-commandline\bin


I've tried deleting the node_modules folder and running npm install again