Mail Template - Styling

@Christian Mahlich are you sure the premailer (Python package) is installed on Odoo.sh ?

Please could you submit you error report on https://github.com/novacode-nl/odoo-addons So we can easily followup.

Hey, I tried to install the module on Odoo.sh but received following error: Error: Odoo Server Error Traceback (most recent call last): File "/home/odoo/src/odoo/odoo/http.py", line 656, in _handle_exception return super(JsonRequest, self)._handle_exception(exception) File "/home/odoo/src/odoo/odoo/http.py", line 314, in _handle_exception raise pycompat.reraise(type(exception), exception, sys.exc_info()[2]) File "/home/odoo/src/odoo/odoo/tools/pycompat.py", line 87, in reraise raise value File "/home/odoo/src/odoo/odoo/http.py", line 698, in dispatch result = self._call_function(**self.params) File "/home/odoo/src/odoo/odoo/http.py", line 346, in _call_function return checked_call(self.db, *args, **kwargs) File "/home/odoo/src/odoo/odoo/service/model.py", line 97, in wrapper return f(dbname, *args, **kwargs) File "/home/odoo/src/odoo/odoo/http.py", line 339, in checked_call result = self.endpoint(*a, **kw) File "/home/odoo/src/odoo/odoo/http.py", line 941, in __call__ return self.method(*args, **kw) File "/home/odoo/src/odoo/odoo/http.py", line 519, in response_wrap response = f(*args, **kw) File "/home/odoo/src/odoo/addons/web/controllers/main.py", line 966, in call_button action = self._call_kw(model, method, args, {}) File "/home/odoo/src/odoo/addons/web/controllers/main.py", line 954, in _call_kw return call_kw(request.env[model], method, args, kwargs) File "/home/odoo/src/odoo/odoo/api.py", line 759, in call_kw return _call_kw_multi(method, model, args, kwargs) File "/home/odoo/src/odoo/odoo/api.py", line 746, in _call_kw_multi result = method(recs, *args, **kwargs) File "", line 2, in button_immediate_install File "/home/odoo/src/odoo/odoo/addons/base/models/ir_module.py", line 74, in check_and_log return method(self, *args, **kwargs) File "/home/odoo/src/odoo/odoo/addons/base/models/ir_module.py", line 445, in button_immediate_install return self._button_immediate_function(type(self).button_install) File "/home/odoo/src/odoo/odoo/addons/base/models/ir_module.py", line 561, in _button_immediate_function modules.registry.Registry.new(self._cr.dbname, update_module=True) File "/home/odoo/src/odoo/odoo/modules/registry.py", line 86, in new odoo.modules.load_modules(registry._db, force_demo, status, update_module) File "/home/odoo/src/odoo/odoo/modules/loading.py", line 421, in load_modules loaded_modules, update_module, models_to_check) File "/home/odoo/src/odoo/odoo/modules/loading.py", line 313, in load_marked_modules perform_checks=perform_checks, models_to_check=models_to_check File "/home/odoo/src/odoo/odoo/modules/loading.py", line 222, in load_module_graph load_data(cr, idref, mode, kind='data', package=package, report=report) File "/home/odoo/src/odoo/odoo/modules/loading.py", line 68, in load_data tools.convert_file(cr, package.name, filename, idref, mode, noupdate, kind, report) File "/home/odoo/src/odoo/odoo/tools/convert.py", line 802, in convert_file convert_xml_import(cr, module, fp, idref, mode, noupdate, report) File "/home/odoo/src/odoo/odoo/tools/convert.py", line 852, in convert_xml_import relaxng.assert_(doc) File "src/lxml/etree.pyx", line 3542, in lxml.etree._Validator.assert_ AssertionError: Element odoo has extra content: data, line 7