@mariobehling - Issue Type: Bug ### Short description - It's can't deploy on Heroku. - First I tried with the default buildpack for deploy loklak on Heroku.  #### Then I got this  - As this [article](https://elements.heroku.com/buildpacks/loklak/heroku_buildpack_ant_loklak) I change the buildpack. But the same thing happened.  ### Description I need all of your help for resolving this.