Critical error in combination with WPML

If the plugin is in use in combination with WPML, site editing of the translations leads to a critical error. But i can’t see the detailed error message and wordpress seems to don’t send an email with the error like usual…

• This topic was modified 4 hours, 33 minutes ago by foxcom.
• This topic was modified 4 hours, 25 minutes ago by foxcom.
• This topic was modified 4 hours, 24 minutes ago by foxcom.