some conflict with another plug in and wordpress

Hi Appointments Team !

I'm very happy to purchase this great plug in. I've just installed it and i see that doing some strange bug in my wordpress.

For example with my plug in "Google analyticator" i've a message like this : Fatal error: Cannot redeclare class Google_Exception in /homepages/40/d247938576/htdocs/DossierSiteWaio/wp-content/plugins/google-analyticator/google-api-php-client/src/Google_Client.php on line 407

Better, in my widget settings in admin, when Appointments is Activate i do not see my right column with my active widget, and i see a part of my inactive widget.

Can you enlighten me about these strange phenomena? (May be there another conflict ...)

Thank you,
Ludovic