hi,

i just installed Odoo 12 on a Ubuntu 18.04 server. After the fresh installation, everything worked fine, then i loaded the German translation, after i applied it to a customer, the system gives me a error message when i try to send a quotation via email.

The error message:

Fehler beim Erstellen der Vorlage <Template memory:7f2207a71780> mit den Werten {'format_date': <function MailTemplate._render_template.<locals>.<lambda> at 0x7f2215954400>, 'format_tz': <function MailTemplate._render_template.<locals>.<lambda> at 0x7f2215954d08>, 'format_amount': <function MailTemplate._render_template.<locals>.<lambda> at 0x7f2215954ae8>, 'user': res.users(2,), 'ctx': {'lang': 'de_DE', 'tz': False, 'uid': 2, 'active_model': 'sale.order', 'active_id': 3, 'active_ids': [3], 'default_model': 'sale.order', 'default_res_id': 3, 'default_use_template': True, 'default_template_id': 15, 'default_composition_mode': 'comment', 'mark_so_as_sent': True, 'custom_layout': 'mail.mail_notification_paynow', 'proforma': False, 'force_email': True, 'search_disable_custom_filters': True, 'tpl_partners_only': True}, 'object': mail.template(3,)}

...the pdf is not generated, the email preview is empty. 

if i switch the customer back to english, the error disappears but odoo needs to genereate german pdfs for its shop.

edit: the error does not only occur with quotations, i get this error on every task which involves translated email templates.

how do i fix this?

thanks