Zend certified PHP/Magento developer

nosto.ERROR: NostoRequestHttpExceptionHttpResponseException

I use Nosto extension to track and update the settings for Store views and recently started getting a serious problem, my Default Store View configuration is a total blank page.

Store > Configuration > Scope: Default Store view.

I could find this error on log/system.log:

nosto.ERROR: NostoRequestHttpExceptionHttpResponseException .. track 1#…#30

nosto.WARNING: Unable to update the settings for the store view

Has someone ever experienced something similar? I tried to debug but couldn’t understand what is wrong.

Thanks for all help or suggestions.