Hi Patrick,
WP 5.0.3., Statify 1.6.3. I investigated a little bit and found 2 problems.
The main problem seems to be a conflict with the SearchWP plugin (https://searchwp.com/). When SearchWP is active, no charts are generated and this error message is shown in the FF console:
TypeError: can't assign to property "top" on 5: not an object chartist.js:64:25
c.extend chartist.js:64:25
c.extend chartist.js:64:25
c.optionsProvider chartist.js:534:24
c.Line chartist.js:1133:24
eefstatifyLineChart https://wp-test.local/wp-content/plugins/extended-evaluation-for-statify/js/functions.js:123:17
<anonym> https://wp-test.local/wp-admin/admin.php:229:4
If I deactivate SearchWP, the charts work fine. But the console still shows two warnings, because the js source maps are not available:
Source-Map-Fehler: request failed with status 404
Ressourcen-Adresse: https://wp-test.local/wp-content/plugins/extended-evaluation-for-statify/lib/chartist.min.js?ver=2.5.0
Source-Map-Adresse: chartist.min.js.map[Weitere Informationen]
Source-Map-Fehler: request failed with status 404
Ressourcen-Adresse: https://wp-test.local/wp-content/plugins/extended-evaluation-for-statify/lib/chartist-plugin-tooltip.min.js?ver=2.5.0
Source-Map-Adresse: chartist-plugin-tooltip.min.js.map[Weitere Informationen]
Maybe you can contact Jonathan from SearchWP? I can get in touch with him as well, if you like.
Best regards
Matthias