Q:

Errors prevented isopacket load: While loading isopacket `constraint-solver`: Cannot call method 'slice' of null

When launching my meteor app with the following command:
MONGO_URL="mongodb://localhost:27017/vision-test" PORT=8282 ROOT_URL="sertal.esb.local:8383" meteor -p 8383

I get following error:
Errors prevented isopacket load:              

While loading isopacket `constraint-solver`:
packages/meteor/url_server.js:11:1: Cannot call method 'slice' of null
at Meteor.absoluteUrl.options (packages/meteor/url_server.js:11:1)
at <runJavaScript-2>:1109:4
at <runJavaScript-2>:1194:3

The same error appears when I use the parameters to run the built application.

A:

the ROOT_URL="sertal.esb.local:8383" parameter is missing the http:// part. The http:// or https:// part of the ROOT_URL is mandatory 

