You may have followed the integration process as outlined in the PopupAlly documentation. This process is updated from that, as there is a new step that needs to be taken after copying your ConvertKit form into PopupAlly settings. We would highly recommend you update your PopupAlly forms to follow this process, even if these forms are currently collecting subscribers without issue.
Here are the steps to connecting PopupAlly & ConvertKit:
1. Open your PopupAlly Settings and create your popup with desired display and style settings.
2. In ConvertKit, go to your Form Settings > Embed tab and click Raw HTML. Grab the full HTML from your form.
3. Paste your Form code into the 'Sign Up HTML' box in the Style Settings tab.
4. Save your form.