Got this working! Removed the .nvm directory, removed the symlinks, shutdown pm2 and re-ran the installation script and it all went in fine!

sudo rm -rf ~/.nvm
sudo rm -f /usr/local/bin/node
sudo rm -f /usr/local/bin/nvm
pm2 stop mm
sudo rm -rf ~/MagicMirror
bash -c "$(curl -sL https://raw.githubusercontent.com/MichMich/MagicMirror/master/installers/raspberry.sh)"

I got an error on npm not being the right version, so upgraded that:

sudo npm i -g npm

(Note sudo is working now, which it wasn’t before) And now my node and npm versions look good and pm2 is running MagicMirror again!

pi@raspberrypi:/ $ node -v
v9.11.2
pi@raspberrypi:/ $ npm -v
6.5.0

Thanks everyone for the help!

.nvm/

looks like node version manager (nvm) was used to install these…

you could temporarily remove those folders from the PATH environment variable.

or search for remove nvm… and found

No, all you need to do is remove $NVM_DIR (~/.nvm is the default), and the relevant 2 lines in your profile file (but you also can leave those behind, since they’re guarded by a file existence check).

pi@raspberrypi:~/MagicMirror $ which npm
/home/pi/.nvm/versions/node/v11.6.0/bin/npm
pi@raspberrypi:~/MagicMirror $ which node
/home/pi/.nvm/versions/node/v11.6.0/bin/node

@rmeskill looks like node is also downlevel

Do you mean I should upgrade it? this isn’t enough:

pi@raspberrypi:~/MagicMirror $ node -v
v11.6.0

@rmeskill try do it in the MagicMirror folder
sudo npm i -g npm

Sudo still doesn’t work, but I tried it again just ‘npm i -g npm’ in the MagicMirror folder. Now I’m trying npm install again in the MagicMirror folder again, so I guess we’ll see, but it looks like it’s stuck at the same point as last time

Trying just with npm i -g npm instead…

Did give me a positive output:

Trying just with npm i -g npm instead…

Trying npm install again…

I just installed a module and it asked me to update NPM think i did it in the root directory not MagicMirror one can be sure.
This is what worked for me
sudo npm i -g npm

sudo npm i -g npm didn’t work for me, got this error:

pi@raspberrypi:~ $ sudo npm i -g npm
/usr/local/lib/node_modules/npm/bin/npm-cli.js:85
      let notifier = require('update-notifier')({pkg})
      ^^^

SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
    at exports.runInThisContext (vm.js:53:16)
    at Module._compile (module.js:414:25)
    at Object.Module._extensions..js (module.js:442:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:311:12)
    at Function.Module.runMain (module.js:467:10)
    at startup (node.js:134:18)
    at node.js:961:3

Trying just with npm i -g npm instead…

I just installed a module and it asked me to update NPM think i did it in the root directory not MagicMirror one can be sure.

This is what worked for me
sudo npm i -g npm

pi@raspberrypi:~ $ tail /home/pi/.npm/_logs/2019-01-06T14_26_53_131Z-debug.log
12308 http fetch GET 200 https://registry.npmjs.org/core-js/-/core-js-2.5.1.tgz 48668ms
12309 silly extract core-js@2.5.1 extracted to /home/pi/MagicMirror/node_modules/.staging/core-js-bce1a382 (63355ms)
12310 http fetch GET 200 https://registry.npmjs.org/clarinet/-/clarinet-0.12.3.tgz 60019ms
12311 silly extract clarinet@^0.12.0 extracted to /home/pi/MagicMirror/node_modules/.staging/clarinet-d9485acf (60537ms)
12312 http fetch GET 200 https://registry.npmjs.org/rxjs/-/rxjs-6.3.3.tgz 216457ms
12313 silly extract rxjs@^6.1.0 extracted to /home/pi/MagicMirror/node_modules/.staging/rxjs-ec2c3fab (217547ms)
12314 timing npm Completed in 9958812ms
12315 error cb() never called!
12316 error This is an error with npm itself. Please report this error at:
12317 error https://npm.community