When i run ( ionic cordova build android --release ) to make .apk file . the error occur ( TypeError: env.runcmd is not a function). I try following step to resolve like. 1.npm install @ionic/cli-plugin-cordova@latest it not solve.
May be issues with your plugins out of date or any bugs with latest upgrades.
Try :
Remove your node_modules folder npm install --save --save-exact ionic@3.6.0 npm install
Freshly install all the node modules.