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It appears that your form has a submission limit of 232 submissions. This means that once you reach that limit, you will get the error message "Este formulario no está disponible actualmente!". To re-enable your from again, I would suggest you remove the submission limit.
Click Preferences > Form Limits > Submission Limit
For more information on Form Limits, you can also check out this guide: How to Limit Submissions in a Form
Do let us know if you need further assistance.