COM_VIRTUEMART_MISSING_VALUE_FOR_FIELD in cart view only in sef mode.

[xfile.deb]

Hello there!

I'm running Joomla 3.7.4, VirtueMart 3.2.2 and php version are 7.0.19-1.

I'm developing a multilingual ecommerce: Italian (default), English and German.

Everything worked properly up to the joomla version 3.7.2.
After the two joomla (3.7.3 and 3.7.4) updates in the shopping cart view I get the system-message (alert-notice)  'COM_VIRTUEMART_MISSING_VALUE_FOR_FIELD' whitout any reference to the missing field.

This message only appears with the sef mode activated in the German and English languages.
If I use the Italian (default language) with the sef Mode activated, the message does not appear
If I use non-sef mode everything works correctly in any languages.

I can not understand and find the cause of this error.
Is there someone who can help me?

Thanks

Carlo.