How to "refresh" and fix an old Project, please Help a newbye

Hi all, i just received an old source (it’s one year old), and i have several problems.
What are exactly the guidelines to “update” and refresh an old project ?

anyway i have some strange errors : this is my list of plugins :
victormacavero$ ionic plugins
✗ (node:3308) fs: re-evaluating native module sources is not supported. If you are using the graceful-fs module, please update it to a more recent version.
com.ionic.keyboard 1.0.4 "Keyboard"
com.phonegap.plugins.PushPlugin 2.5.0 "PushPlugin"
cordova-plugin-app-preferences 0.6.1 "AppPreferences"
cordova-plugin-network-information 1.0.0 "Network Information"
cordova-plugin-whitelist 1.0.0 "Whitelist"
org.apache.cordova.console 0.2.13 "Console"
org.apache.cordova.device 0.3.0 "Device"
org.apache.cordova.geolocation 0.3.12 "Geolocation"
org.pbernasconi.progressindicator 1.1.0 "Progress Indicator" 2.6.0 “Launch Navigator”

I tried adding ionic-plugin-keyboard first, and the removing com.ionic.keyboard (never compiles to me).
Then i always have this error trying to add remove other plugins ::
Error: Cannot find plugin.xml for plugin “com.ionic.keyboard”. Please try adding it again.

But i removed it !

WHy ?