When I try to print from the Customer invoice view I get an Odoo Client Error:
SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data
http://aaa.bbbb.local:8069/web/js/web.assets_backend/90c25bb:2965
Printing from the Customer invoice form does work correctly.
It is a bare metal Odoo 8 installation installed on a Univention UCS server. I have installed wkhtmltox and it appear to work correctly.
Where do I go wrong?