Hi,
Sorry that you’re having trouble! The only thing that I know of that has caused this previously is a conflict with the Edit Flow plugin. Are you using that plugin by any chance? If so, that is probably what is causing the problem. It is not an issue that WordPoints can fix, it is actually a problem with Edit Flow, but it looks like it might be fixed soon. I’d suggest deactivating Edit Flow temporarily, while configuring WordPoints. Then Edit Flow could be reactivated after you’ve gotten WordPoints set up.
If you aren’t using the Edit Flow plugin, then it may be a conflict with another plugin or theme. If you know how to check your browser’s error console, that might reveal the cause of the issue. Otherwise, you can try deactivating your plugins one by one, and see if the problem goes away after deactivating each one. That will reveal the cause of the problem.