I can not edit my form, the page shows blank.

Olá, boa tarde!

Não estou conseguindo editar meu formulário. A página de edição fica toda branca.

I just checked your form in edit mode, and it displayed fine:

Please try clearing your forms cache: https://www.jotform.com/help/229-How-to-Clear-Your-Form-Cache 

Also try clearing your browsers cache. If the issue continues, please share a screenshot of the Browser console report, while the issue is happening: https://www.jotform.com/help/453-How-to-get-a-console-report-from-most-common-browsers