I'm sorry you are experiencing this issue when trying to access your Contacts on your account. Sometimes closing down the Internet and coming back in resolves the issue. If possible, you can also try using another Internet browser. If the issue persists, please let us know, You can email us directly: social_support(at)constantcontact(dot)com and reference this post. We would be happy to assist. Also include any specifics such as:
1.) The browser you are using
2.) What Internet Service Provider you are using
3.) Is it just the Contacts page or other tabs as well
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