Jiff examples not working

Running any of the jiff examples gives me the following error. As I am not really familiar with node, I have no idea why this error arises and how to fix it. I'd be very grateful for help :)
root@964978ccb2bf:~/jiff# npm run-script test-demo -- demos/mult3    

> jiff-mpc@0.0.1 test-demo /root/jiff
> ./demos/run-test.sh "demos/mult3"

Server logs at logs/mult3.log
/root/jiff/demos/mult3/server.js:11
require('../../lib/jiff-server').make_jiff(http, { logs:true });
                                 ^

TypeError: require(...).make_jiff is not a function
    at Object.<anonymous> (/root/jiff/demos/mult3/server.js:11:34)
    at Module._compile (internal/modules/cjs/loader.js:701:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:712:10)
    at Module.load (internal/modules/cjs/loader.js:600:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:539:12)
    at Function.Module._load (internal/modules/cjs/loader.js:531:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:754:12)
    at startup (internal/bootstrap/node.js:283:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)

  Test
    1) Exhaustive

  0 passing (116ms)
  1 failing

  1) Test
       Exhaustive:
     TypeError: jiff.make_jiff is not a function
      at Object.exports.connect (/root/jiff/demos/mult3/mpc.js:16:27)
      at Context.<anonymous> (/root/jiff/demos/mult3/test.js:130:11)
      at callFnAsync (/root/jiff/node_modules/mocha/lib/runnable.js:377:21)
      at Test.Runnable.run (/root/jiff/node_modules/mocha/lib/runnable.js:324:7)
      at Runner.runTest (/root/jiff/node_modules/mocha/lib/runner.js:442:10)
      at /root/jiff/node_modules/mocha/lib/runner.js:560:12
      at next (/root/jiff/node_modules/mocha/lib/runner.js:356:14)
      at /root/jiff/node_modules/mocha/lib/runner.js:366:7
      at next (/root/jiff/node_modules/mocha/lib/runner.js:290:14)
      at Immediate._onImmediate (/root/jiff/node_modules/mocha/lib/runner.js:334:5)
      at runCallback (timers.js:705:18)
      at tryOnImmediate (timers.js:676:5)
      at processImmediate (timers.js:658:5)

kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec]
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! jiff-mpc@0.0.1 test-demo: `./demos/run-test.sh "demos/mult3"`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the jiff-mpc@0.0.1 test-demo script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2021-05-26T18_50_37_333Z-debug.log
MPC-SoK / frameworks

Jiff examples not working #53
