Where [ your Google Calendar ID ] occurs above, use your Gmail login name. Continue through the setup, and you'll eventually be prompted for your password etc.
Now, your Google Calendar should show-up in Lightning. To accept the ics file, YOU MUST have Thunderbird Email client set to view attachments INLINE. If you do so, the Accept Decline ect buttons will show when you open the email. ALSO, I've found that you must actually open the email, not just look at it in the preview window. Hope this helps - it's working for me.
I think I can help.
First, create a new CalDAV Calendar in Lightning that points to your Google calendar using the following when prompted:
https:/ /www.google. com/calendar/ dav/ [ your Google Calendar ID ] /events
Where [ your Google Calendar ID ] occurs above, use your Gmail login name. Continue through the setup, and you'll eventually be prompted for your password etc.
Now, your Google Calendar should show-up in Lightning. To accept the ics file, YOU MUST have Thunderbird Email client set to view attachments INLINE. If you do so, the Accept Decline ect buttons will show when you open the email. ALSO, I've found that you must actually open the email, not just look at it in the preview window. Hope this helps - it's working for me.