If you are using non-HubSpot forms on an external (not hosted in HubSpot) page, the tracking code needs to be installed - otherwise the system doesn't know which HubSpot account a form and form submission belongs to.
If your landing page or site is hosted on HubSpot, you should be using HubSpot forms.
Non-HubSpot forms are HTML forms on your external site that weren't created in HubSpot.
Hope that helps.
Frank
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Hello frank! I've tried again and this time I've created a regular pop-up form ( HubSpot form) and publish it but the problem remains constant (form is not showing in website) help me to find out solution