I'm using Thunderbird 31.1.12, Lightning 3.3.1 with Provider for Google Calendar 1.0.1 in Ubuntu 14.04
When I try to add my google calendars, I select 'Create new calendar'> 'On my Network'> and select 'Google', I find that the location field disappears as soon as I select 'Google'.
In the next window it asks me to 'pick an existing session or a new session or enter your email address to create a new session'. This is not how it usually functions, (or indeed how it functions on other platforms). Even if I enter my google address at that stage it doesn't successfully find my online calendar.
If anyone can shed any light on this I would be grateful as it's very frustrating at the moment.
Best wishes and thanks!
by chance I did that last night:
-delete first the old "network calendar(s)"
-choose new calendar
-choose google
-insert your email adress and your password
a window opens showing you your google calendars
-choose the calendars you want to syncronize with Lightning
Done