Actually, this can be fixed from the settings. First, ensure that you use WP-Poll 2.50
1. Log in to your WP (with admin rights)
2. Assuming you have activated the WP-Poll plugins, go to Polls -> Poll Options
3. Go to the section where it says “Logging Method”. In here you can find a few options to choose from
– Do not log
– Logged by Cookie
– Logged by IP
– Logged by IP and Cookie
– Logged by Username
To solve the issue you face, select “Logged by Cookie”or other options according to your wish and it should work.