I'm getting the error message "Environment not found" when clicking on the voting icon of an issue when it has had comments appended. However, if it was a new issue which had no comments it worked fine.
On further examination the plug-in seems to be redirecting me to a page which had the URL address, for example, "/ticket/9" where the ticket's actual address was "/project1/ticket/9".
Note I've my base URL set in the trac.ini file as
base_url = http://xxxxxx:8080/project1/
To fix the problem, for my installation, I examined the code from the Five Star Vote plugin and saw that there was a difference regarding the returning URL on the last line of the function def process_request(self, req):
This plug-in uses req.redirect(resource) where as the Five Star Vote plugin plug-in uses req.redirect(req.get_header('Referer'))
After making this small change to the last line of the function process_request everything seems to be working as expected.