Problem With Access Token Pay Version

Good night I bought your plugin more than a week ago, I need help with the activation of the access token, I have followed the recommendations they give and even uninstalled extra plugins to be able to carry out the activation but it still does not work, the button does not respond or display any option, I hope you could give me support or failing that I offer you a user of my site so that you could give me more advice, thank you very much