diff -urEb VolView-4.3.0.orig/src/io/itk/itkConfig.js VolView-4.3.0/src/io/itk/itkConfig.js
--- VolView-4.3.0.orig/src/io/itk/itkConfig.js  2025-01-16 18:46:08.962374027 +0100
+++ VolView-4.3.0/src/io/itk/itkConfig.js       2025-01-17 11:10:48.362129043 +0100
@@ -2,8 +2,15 @@
 
 const base = import.meta.env.BASE_URL;
 
-const fullUrl = (relative) =>
-  new URL(join(base, relative), document.location.origin).href;
+const fullUrl = (relative) => {          // ex: /itk/image-io
+  const u = new URL(document.location);  // ex: http://localhost:8043/orthanc/volview/index.html
+  const origin = u.origin;               // ex: http://localhost:8043
+  let pathParts = u.pathname.split('/'); // ex: ['', 'orthanc', 'volview', 'index.html']
+  pathParts.pop();                       // ex: ['', 'orthanc', 'volview']          
+
+  const url = origin + pathParts.join('/') + relative; // ex http://localhost:8043/orthanc/volview/itk/image-io
+  return url;
+}
 
 const itkConfig = {
   pipelineWorkerUrl: fullUrl('/itk/itk-wasm-pipeline.min.worker.js'),
diff -urEb VolView-4.3.0.orig/vite.config.ts VolView-4.3.0/vite.config.ts
--- VolView-4.3.0.orig/vite.config.ts   2025-01-16 18:46:08.862370324 +0100
+++ VolView-4.3.0/vite.config.ts        2025-01-16 19:12:29.866854537 +0100
@@ -114,6 +114,7 @@
       },
     ],
   },
+  base: './',
   plugins: [
     {
       name: 'virtual-modules',