Uncaught Error: Script error for "tree"

New install done via war as well as debian package.
When I access the install via ip:8080/xwiki all is perfect in all cases.
When I access it via a URL such as wiki.mydomain.zone some js doesnt load properly and as such the left navigation menu disappears. tested in both chrome and firefox.

The console log in chrome is:

GET http://wiki.erp.zone:8080/xwiki/bin/view/Main/$!services.webjars.url(%22org…ki.platform:xwiki-platform-tree-webjar%22,%20%22tree$%7Bminified%7D%22).js (require.min.js?r=1:34)

Uncaught Error: Script error for "tree" (require.min.js?r=1:7)