Hi @victormesias,
I am sorry to hear that you are encountering an issue with your contact form within popup. Sure, I will be happy to assist you in resolving your issue.
I confirmed your issue from my side after checking your shared video.
See here: https://share.getcloudapp.com/ApugNDPz
I replicated a similar scenario on our testing platform, and there was no issue with the selection of dates in the contact form.
See here: https://share.getcloudapp.com/YEu48W4e
Please note that the Popups for Divi plugin is limited in terms of supporting forms that heavily rely on JavaScript. The “Divi Areas Pro” plugin, a premium and extended version of the “Popups for Divi” theme, works flawlessly with such forms.
It is also observed that cache and CSS & Javascript minifying plugins sometimes cause such issues.
Could you please check and temporarily deactivate any of your minifying or cache plugins to see if the issue still exists?
Alternatively, You can try switching to the “Divi Areas Pro” plugin to resolve your issue. You may find additional information and supported features regarding “Divi Areas Pro” at this link: https://divimode.com/divi-areas-pro/
I hope this information helps. Please do not hesitate to ask any further questions. Thank you.