Error: Failed to load resource

Does the official backend work?
https://github.com/heiseonline/shariff-backend-php

No. Is this an PHP Issue? I am using PHP 5.6.

Already saw that. Might be a bug in the Heise code but I don’t know where.
Might be better if you create an issue over here: https://github.com/heiseonline/shariff-backend-php/issues

I do not have a GitHub Account.

But it’s not very intelligent if I create an issue. If you don’t want GitHub, create a comment under the Shariff article on heise.de .

FYI:

https://github.com/heiseonline/shariff-backend-php/issues/4

Solved with upcoming update.