The poll is inactive: In that case, all buttons are disabled and cannot be clicked at all.

Geoblocking prevents participation: Our customers can restrict participation to certain countries. If the user then clicks on an answer, a corresponding error message is displayed. Although users are often physically located in a country that would in principle allow participation, they are virtually assigned to another country based on their IP address. The main reason for this is a VPN that the user has activated. We use MaxMind's database for detection and users can easily check their location here: https://www.maxmind.com/en/locate-my-ip-address

We have detected fraud: If a user tries to vote too many times within a short period of time, we will block the user for 10 minutes. We often see this behaviour with multiple users in a larger office using the same IP address. For internal testing (e.g., during the conception phase of a poll) this can be mitigated by setting the "Multiple Voting" option to "Every second".

The reCaptcha was not solved correctly: Our customers can secure a poll using the well-known picture puzzles. If it is solved incorrectly (or even blocked by a plug-in because it is loaded from a Google domain), participation is not possible.
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The reCaptcha was not configured correctly. In this case, please contact the website owner directly.