3 files changed, 4 insertions, 0 deletions
diff --git a/ext/js/templates/sandbox/template-renderer-frame-api.js b/ext/js/templates/sandbox/template-renderer-frame-api.js
index 31ba4500..91400ab8 100644
--- a/ext/js/templates/sandbox/template-renderer-frame-api.js
+++ b/ext/js/templates/sandbox/template-renderer-frame-api.js
@@ -16,6 +16,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+import {ExtensionError} from '../../core/extension-error.js';
+
 export class TemplateRendererFrameApi {
     /**
      * @param {TemplateRenderer} templateRenderer
diff --git a/ext/js/templates/sandbox/template-renderer.js b/ext/js/templates/sandbox/template-renderer.js
index c7613533..716e3ccc 100644
--- a/ext/js/templates/sandbox/template-renderer.js
+++ b/ext/js/templates/sandbox/template-renderer.js
@@ -17,6 +17,7 @@
  */
 
 import {Handlebars} from '../../../lib/handlebars.js';
+import {ExtensionError} from '../../core/extension-error.js';
 
 export class TemplateRenderer {
     constructor() {
diff --git a/ext/js/templates/template-renderer-proxy.js b/ext/js/templates/template-renderer-proxy.js
index e67b715a..642eea8b 100644
--- a/ext/js/templates/template-renderer-proxy.js
+++ b/ext/js/templates/template-renderer-proxy.js
@@ -17,6 +17,7 @@
  */
 
 import {generateId} from '../core.js';
+import {ExtensionError} from '../core/extension-error.js';
 
 export class TemplateRendererProxy {
     constructor() {