Adobe Acrobat is a premium Adobe software product. You can subscribe to an individual plan from $12.99 per month. ... but you won’t usually need them to create a fillable form.

The server software is accompanied by version 5.0 of Adobe Form Designer, a collection of tools for designing XML- and PDF-based forms and linking them to corporate databases.

When the software is updated, try to fill and sign again. For Adobe Acrobat reader, you can click Help then Check for updates . 3] PDF security certificate blocking signing ...