I want to share some dynamic content on google+. For this I checked it https://developers.google.com/+/web/share/interactive#rendering_the_button_with_javascript
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(The error has the answer for you)
need to set javascript origin in google console api As
origin=**http://www.pubandbar-network.co.uk**
scope=https://www.googleapis.com/auth/plus.login
response_type=code token id_token gsession
access_type=online
redirect_uri=postmessage
cookie_policy=single_host_origin
proxy=oauth2relay554026710
*origin=http://www.pubandbar-network.co.uk*
state=1995523240|0.4607792083184853
display=page
client_id=102180630313.apps.googleusercontent.com
authuser=0