Thanks to Derek Cardinell for finding and helping fix #59

Author: null93

Helper/Data.php

@@ -11,7 +11,6 @@
 	use Magento\Store\Model\ScopeInterface;
 	use Magento\Store\Model\StoreManagerInterface;
 	use Magento\PageCache\Model\Cache\Server;
-	use Magento\Framework\Module\ModuleListInterface;
 
 	/**
 	 * @version         3.0.0
@@ -27,8 +26,8 @@ class Data extends AbstractHelper {
 		protected $_storeManager;
 		protected $_http;
 		protected $_server;
-		protected $_modules;
 
+		const MODULE_VERSION = "3.0.0";
 		const DEBUG_DISABLED = 1;
 		const DEBUG_ENABLED = 2;
 
@@ -37,15 +36,13 @@ public function __construct (
 			StoreManagerInterface $storeManager,
 			WriterInterface $configWriter,
 			Http $http,
-			Server $server,
-			ModuleListInterface $modules
+			Server $server
 		) {
 			$this->_configReader = $configReader;
 			$this->_storeManager = $storeManager;
 			$this->_configWriter = $configWriter;
 			$this->_http = $http;
 			$this->_server = $server;
-			$this->_modules = $modules;
 		}
 
 		protected function _getConfigValue ( $path, $scope = ScopeInterface::SCOPE_STORE, $storeId = null ) {
@@ -116,7 +113,7 @@ public function isDebugMode () {
 		}
 
 		public function getModuleVersion () {
-			return $this->_modules->getOne ("JetRails_Varnish") ["setup_version"];
+			return self::MODULE_VERSION;
 		}
 
 		public function getVarnishServersWithPorts () {

Makefile

@@ -15,6 +15,7 @@ bump: ## Bump version in source files based on latest git tag
 	VERSION=$(VERSION); sed -E -i '' "s/(<version>)(.+)(<\/version>)/\1$$VERSION\3/g" ./etc/config.xml
 	VERSION=$(VERSION); sed -E -i '' "s/setup_version=\"([^\"]+)\"/setup_version=\"$$VERSION\"/g" ./etc/module.xml
 	VERSION=$(VERSION); sed -E -i '' "s/schema_version=\"([^\"]+)\"/schema_version=\"$$VERSION\"/g" ./etc/module.xml
+	VERSION=$(VERSION); sed -E -i '' "s/const MODULE_VERSION = \"([^\"]+)\"/const MODULE_VERSION = \"$$VERSION\"/g" ./Helper/Data.php
 
 deploy: ## Deploy code to public_html directory
 	NAMESPACE_PATH=$(NAMESPACE_PATH); mkdir -p "./public_html/app/code/$$NAMESPACE_PATH"

default.vcl

@@ -5,7 +5,7 @@
  * looking to customize the config, please look into the 'default.custom.vcl'
  * file which this config uses to implement it's hooking system.
  *
- * Generated on Magento Community 2.4.2 with JetRails_Varnish@3.0.2
+ * Generated on Magento Community 2.4.2 with JetRails_Varnish@3.0.0
  */
 
 # VCL version 5.0 is not supported so it should be 4.0 even though actually used Varnish version is 6
@@ -38,7 +38,7 @@ acl purge {
 sub vcl_recv {
     call custom_recv_start;
     if (req.method == "GET" && client.ip ~ purge && req.url == "/jetrails/varnish-config/versions") {
-        return (synth(200, "Magento 2.4.2 / Module 3.0.2"));
+        return (synth(200, "Magento 2.4.2 / Module 3.0.0"));
     }
     set req.http.X-Forwarded-For = req.http.CF-Connecting-IP;
     if (req.restarts > 0) {