diff --git a/fichero_printer/CHANGELOG.md b/fichero_printer/CHANGELOG.md
index 802dc9f..33406b0 100644
--- a/fichero_printer/CHANGELOG.md
+++ b/fichero_printer/CHANGELOG.md
@@ -5,6 +5,17 @@ All notable changes to this project are documented in this file.
 The format is based on Keep a Changelog and this project uses Semantic Versioning.
 
 
+## [0.1.34] - 2026-03-18
+
+### Fixed
+- **Web UI**: Fixed URL resolution issue - scan now uses relative URL 'scan' instead of '/scan' to work correctly with Home Assistant ingress.
+- **Web UI**: Improved error handling for non-JSON responses and malformed API responses.
+- **Web UI**: Added better debugging for JSON parsing errors.
+
+### Changed
+- **Web UI**: Updated scan fetch call to match other API calls in the codebase.
+- **Web UI**: Enhanced error messages to include raw response text when JSON parsing fails.
+
 ## [0.1.33] - 2026-03-18
 
 ### Fixed
diff --git a/fichero_printer/config.yaml b/fichero_printer/config.yaml
index 04dd450..d6ca277 100644
--- a/fichero_printer/config.yaml
+++ b/fichero_printer/config.yaml
@@ -1,5 +1,5 @@
 name: "Fichero Printer"
-version: "0.1.33"
+version: "0.1.34"
 slug: "fichero_printer"
 description: "REST API for the Fichero D11s (AiYin) thermal label printer over Bluetooth"
 url: "https://git.leuschner.dev/Tobias/Fichero"
diff --git a/fichero_printer/fichero/api.py b/fichero_printer/fichero/api.py
index 1e52f5e..c55584c 100644
--- a/fichero_printer/fichero/api.py
+++ b/fichero_printer/fichero/api.py
@@ -77,7 +77,7 @@ async def lifespan(app: FastAPI):  # noqa: ARG001
 app = FastAPI(
     title="Fichero Printer API",
     description="REST API for the Fichero D11s (AiYin) thermal label printer.",
-    version = "0.1.33",
+    version = "0.1.34",
     lifespan=lifespan,
     docs_url=None,
     redoc_url=None,
@@ -153,14 +153,25 @@ def _ui_html() -> str:
         console.log('Starting scan request...');
         
         try {
-            const response = await fetch('/scan');
+            const response = await fetch('scan');
             
             if (!response.ok) {
-                const error = await response.json();
-                throw new Error(error.detail || `HTTP error! status: ${response.status}`);
+                try {
+                    const error = await response.json();
+                    throw new Error(error.detail || `HTTP error! status: ${response.status}`);
+                } catch (e) {
+                    const text = await response.text();
+                    throw new Error(`HTTP error! status: ${response.status}, response: ${text}`);
+                }
             }
             
-            const devices = await response.json();
+            let devices;
+            try {
+                devices = await response.json();
+            } catch (e) {
+                const text = await response.text();
+                throw new Error(`Invalid JSON response: ${text}`);
+            }
             
             if (devices.length === 0) {
                 resultsEl.textContent = '📡 No BLE devices found.\n\nTroubleshooting tips:\n- Make sure your printer is powered on\n- Ensure Bluetooth is enabled on this device\n- Bring the printer closer (within 5 meters)\n- Try restarting the printer';
diff --git a/pyproject.toml b/pyproject.toml
index 7c779c7..b71aded 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "fichero-printer"
-version = "0.1.33"
+version = "0.1.34"
 description = "Web GUI, Python CLI, and protocol documentation for the Fichero D11s thermal label printer."
 readme = "README.md"
 requires-python = ">=3.10"