Missing add to cart forms, D9, PadoLazyBuilders.php

Drupal 9.2.9
Commerce 8.x-2.27
Commerce Product Add-on: 8.x-1.1
PHP 7.4

Installed as normal, added reference field to product type, selected product via field, and updated the variations field display to 'with add-ons'. As soon as I change the field display to 'with add-ons' the add to cart section is missing from the product page. All product variation drop downs are also missing. Looking in logs throws this error. Any help would be MUCH appreciated.

Error: Call to undefined method Drupal\Core\Entity\ContentEntityForm::setFormId() in Drupal\commerce_pado\PadoLazyBuilders->addToCartWithAddOnsForm() (line 47 of /modules/commerce_pado/src/PadoLazyBuilders.php)
#0 [internal function]: Drupal\commerce_pado\PadoLazyBuilders->addToCartWithAddOnsForm('15', 'full', true, 'field_optional_...', true)
#1 /core/lib/Drupal/Core/Security/DoTrustedCallbackTrait.php(101): call_user_func_array(Array, Array)
#2 /core/lib/Drupal/Core/Render/Renderer.php(786): Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #lazy_bu...', 'exception', 'Drupal\\Core\\Ren...')
#3 /core/lib/Drupal/Core/Render/Renderer.php(356): Drupal\Core\Render\Renderer->doCallback('#lazy_builder', Array, Array)
#4 /core/lib/Drupal/Core/Render/Renderer.php(201): Drupal\Core\Render\Renderer->doRender(Array, true)
#5 /core/lib/Drupal/Core/Render/Renderer.php(157): Drupal\Core\Render\Renderer->render(Array, true)
#6 /core/lib/Drupal/Core/Render/Renderer.php(578): Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}()
#7 /core/lib/Drupal/Core/Render/Renderer.php(158): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure))
#8 /core/lib/Drupal/Core/Render/Renderer.php(172): Drupal\Core\Render\Renderer->renderPlain(Array)
#9 /core/modules/big_pipe/src/Render/BigPipe.php(693): Drupal\Core\Render\Renderer->renderPlaceholder('callback=commer...', Array)
#10 /core/modules/big_pipe/src/Render/BigPipe.php(547): Drupal\big_pipe\Render\BigPipe->renderPlaceholder('callback=commer...', Array)
#11 /core/modules/big_pipe/src/Render/BigPipe.php(305): Drupal\big_pipe\Render\BigPipe->sendPlaceholders(Array, Array, Object(Drupal\Core\Asset\AttachedAssets))
#12 /core/modules/big_pipe/src/Render/BigPipeResponse.php(112): Drupal\big_pipe\Render\BigPipe->sendContent(Object(Drupal\big_pipe\Render\BigPipeResponse))
#13 /vendor/symfony/http-foundation/Response.php(381): Drupal\big_pipe\Render\BigPipeResponse->sendContent()
#14 /index.php(20): Symfony\Component\HttpFoundation\Response->send()
#15 {main}