Need help connecting to Formassembly

The purpose of this module is to allow a site builder to integrate with FormAssembly without writing a single line of code. If you would like to create a custom integration using FormAssembly API directly (also used in this module's code) then I would recommend
href="https://www.packtpub.com/product/drupal-10-development-cookbook-third-ed...">Drupal
10 Development Cookbook - Third Edition or the paid tutorials at href="https://drupalize.me">drupalize.me. I know Matt & Kevin and the people behind Drupalize.me and all are excellent! If you want cost-free help learning to develop in Drupal, I recommend the excellent camps and local meetup groups along with
href=" https://www.drupal.org/community/contributor-guide/reference-information... → ">Drupal
Slack and Drupal Answers

I know from the direct contact that we had that you are using Drupal 8.9 and the last version of this module that worked in D8 was 1.4. Both are no longer supported but I have reinstalled both locally and I'm going to lead you through the setup here because Drupal is as much a community as a software framework.

1. I understand that you have this module installed (present in the code
   base). Also verify that it is enabled in the site configuration:
   alt="Formassembly module showing enabled status on the Extend page"/>
   If it is not enabled, that is if the checkbox is not checked, then check it
   and click install.
2. Next browse to the base configuration page for this module by going to
   Structure >> FormAssembly Forms or /admin/structure/fa_form/settings
3. Fill in the form shown on this page by placing the proper values in the
   three fields. If you have filled out this form before, as I suspect you
   have, then click the "Reauthorize" checkbox.
   alt="Formassembly configuration form"/>
4. Click submit
5. You should be redirected to FormAssembly to login and authorize the
   connection.
6. You should then be redirected back to your site
7. You should then see this success message displayed above the configuration
   form.
   
8. Click the checkbox next to "Sync now"
   
9. Click Submit
10. You will see a batch process run with a progress bar. When it completes,
    browse to Content >> FormAssembly Forms or /formassembly/fa_form.
    You should see the forms that your FormAssembly user has access to. If your
    instance of FormAssembly is an enterprise instance and your user has access
    to the admin index of forms in FormAssembly, you may return to the
    configuration form, click the "Admin index" checkbox, the "Sync now" and
    resubmit the form to make all the forms into the Drupal site.

Once your forms are listed in Drupal they will be treated as native Drupal content. You may display them on their own page, reference them in a reference field and therefore display them inside other content or however else you want to use them.

For the security of your site, you should make a plan to get to Drupal 10 as your version of Drupal, the PHP version it supports, and the Symfony dependencies, are all beyond end-of-life and out of security support.

See https://www.drupal.org/docs/upgrading-drupal/drupal-8-and-higher → for guides to get to Drupal 9 and then to go from 9 to 10