Cannot unserialize pending submission

Application is giving me an error

Hello:

I'm trying to fill up my taxes through Ariva.org and whenever I click submit, the page keeps giving me an error. Please can you help me out? I need to submit my tax information today so they can give me an appointment for Tuesday.

Thank you so much

Sarah Q.

Greetings,

Allow me to inform you what is JotForm.

JotForm is an online application that allows anyone to create online forms, collect responses directly in your email, and create fillable PDF forms.

JotForm FAQ https://www.jotform.com/faq/

It seems you are trying to fill a form on https://ariva.org/

I opened the site but didn't find JotForm is embedded there

Could you kindly provide share with us the exact page URL that your screenshot referred?
And I advise that you can also contact ariva.org here https://ariva.org/contact/

Regards.