Ok you need to find a working node and npm for all module if you have Bugs Google Aisstant v3 then it is best to check the module first GA v3 needs,
Node: v12.x.x upto v14.x.x
npm: = v6.14.15 (some trouble with v7.x)
I suggest trying.
Do in this order.
sudo npm cache clean -f
sudo npm install -g n
sudo n 14.0
now check npm with npm -v
If 6.14.15 do nothing more but over 7.x use below
sudo npm install -g npm@6.14.15