Magento 2 — debug.log — main.DEBUG: Request validation failed for action "VendorModuleControllerIndexPostInterceptor"

I’m implementing a Custom Module that essentially has the same functionality as the default Magento 2 Contact Form. I’m receiving a very irritating error I can’t seem to find a solution to. It seems my POST request is failing Magento’s request validation, but I’m not sure how to find any more specific information.

I’ve attempted to implement a “CSRFSkip” plugin that bypasses the Magento CSRF validation. I’ve tried changing what my controller extends and implements. I’ve searched the logs extensively.

Here’s my Magento debug.log as the error is happening.

[2019-10-17 19:39:16] main.DEBUG: Request validation failed for action "VendorModuleControllerIndexPostInterceptor" [] []
[2019-10-17 19:41:20] main.DEBUG: Request validation failed for action "VendorModuleControllerIndexPostInterceptor" [] []
[2019-10-17 19:41:21] main.INFO: Broken reference: the 'catalog.compare.sidebar' element cannot be added as child to 'sidebar.additional', because the latter doesn't exist [] []
[2019-10-17 19:41:21] main.INFO: Broken reference: the 'sale.reorder.sidebar' element cannot be added as child to 'sidebar.additional', because the latter doesn't exist [] []
[2019-10-17 19:41:21] main.INFO: Broken reference: the 'wishlist_sidebar' element cannot be added as child to 'sidebar.additional', because the latter doesn't exist [] []

Here’s my controller. /Vendor/Module/Controller/Index/Post.php

<?php

namespace VendorModuleControllerIndex;

use MagentoFrameworkControllerResultFactory;

class Post extends MagentoFrameworkAppActionAction implements MagentoFrameworkAppActionHttpPostActionInterface
{
    /**
     * Post action
     *
     * @return void
     */
    public function execute()
    {
        $post = $this->getRequest()->getPostValue();
        if (!$post['name']) {
            $this->_redirect('/find-a-dealer');
            return;
        }

        $this->inlineTranslation->suspend();
        try {
            $postObject = new MagentoFrameworkDataObject();
            $postObject->setData($post);
            $error = false;

            $this->logger->debug($post['name']);
            if (!Zend_Validate::is(trim($post['name']), 'NotEmpty')) {
                $error = true;
            }

            $this->logger->debug($post['email']);
            if (!Zend_Validate::is(trim($post['email']), 'EmailAddress')) {
                $error = true;
            }

            $this->logger->debug($post['city']);
            if (!Zend_Validate::is(trim($post['city']), 'NotEmpty')) {
                $error = true;
            }

            $this->logger->debug($post['state']);
            if (!Zend_Validate::is(trim($post['state']), 'NotEmpty')) {
                $error = true;
            }

            $this->logger->debug($post['zip']);
            if (!Zend_Validate::is(trim($post['zip']), 'NotEmpty')) {
                $error = true;
            }

            $this->logger->debug($post['part']);
            if (!Zend_Validate::is(trim($post['part']), 'NotEmpty')) {
                $error = true;
            }

            if ($error) {
                throw new Exception();
            }

            $storeScope = MagentoStoreModelScopeInterface::SCOPE_STORE;
            $transport = $this->_transportBuilder
                ->setTemplateIdentifier($this->scopeConfig->getValue(self::XML_PATH_EMAIL_TEMPLATE, $storeScope))
                ->setTemplateOptions(
                    [
                        'area' => MagentoBackendAppAreaFrontNameResolver::AREA_CODE,
                        'store' => MagentoStoreModelStore::DEFAULT_STORE_ID,
                    ]
                )
                ->setTemplateVars(['data' => $postObject])
                ->setFrom($this->scopeConfig->getValue(self::XML_PATH_EMAIL_SENDER, $storeScope))
                ->addTo($this->scopeConfig->getValue(self::XML_PATH_EMAIL_RECIPIENT, $storeScope))
                ->setReplyTo($post['email'])
                ->getTransport();

            $transport->sendMessage();

            $this->inlineTranslation->resume();
            $this->messageManager->addSuccess(
                __('Thanks for contacting us with your comments and questions. We'll respond to you very soon.')
            );
            $this->getDataPersistor()->clear('find-a-dealer');
            $this->_redirect('find-a-dealer');
            return;
        } catch (Exception $e) {
            $this->inlineTranslation->resume();
            $this->messageManager->addError(
                __('We can't process your request right now. Sorry, that's all we know.')
            );
            $this->getDataPersistor()->set('find-a-dealer', $post);
            $this->_redirect('find-a-dealer');
            return;
        }
    }

    /**
     * Get Data Persistor
     *
     * @return DataPersistorInterface
     */
    private function getDataPersistor()
    {
        if ($this->dataPersistor === null) {
            $this->dataPersistor = ObjectManager::getInstance()
                ->get(DataPersistorInterface::class);
        }

        return $this->dataPersistor;
    }
}

I expect for my post function to run and dispatch my email.

What actually happens is a redirect to my form page, and some validation related errors in the logs.