Meteor tool promise_server.js unexpcted token

Dear all,

i face following issues when i try to build my existing app:

/home/mt/.meteor/packages/meteor-tool/.2.16.0.1jbb6a4.oep5++os.linux.x86_64+web.browser+web.browser.legacy+web.cordova/mt-os.linux.x86_64/dev_bundle/lib/node_modules/meteor-promise/promise_server.js:218

SyntaxError: Unexpected token

in JSON at position 418

We dindt touch anything there, whats the way to fix that?