My work instructions don't display

Issues with WebView2 Browser

Tascus uses an embedded WebView2 (Edge) browser to display work instructions and some reports.

If these do not display, there may be an issue with the WebView2 installation,

WebView2 Not Initialising

Symptom

On application startup:

• Embedded WebView2 browser does not load

• No error message shown

• The following folders are not created in the application directory (C:\ProgramData\Tascus):

  • Tascus.exe.WebView2

  • Tascus Launcher.exe.WebView2

On working machines, these folders are created automatically when the application opens.

What This Means

If the .WebView2 folders are not created, the Microsoft Edge WebView2 runtime has not initialised. This is a WebView2 runtime resolution failure.

Root Cause

The Microsoft Edge WebView2 Runtime is:

• Not installed machine-wide

• Installed per-user only

• Corrupt or not registered

• Blocked by corporate policy (AppLocker / WDAC / Defender)

• Disabled via Group Policy

Required Fix

1. Install WebView2 Runtime (Machine-Wide)

Install:

Microsoft Edge WebView2 Runtime – Evergreen Standalone Installer (x64)

Important:

Use the offline / standalone installer

Install machine-wide

Do NOT use the bootstrapper version

2. Confirm Runtime Location Exists

After installation, this folder must exist:

C:\Program Files (x86)\Microsoft\EdgeWebView2\

3. Ensure Runtime Is Not Blocked

Confirm the following are not restricted:

msedgewebview2.exe

WebView2 runtime components

Edge WebView2 execution under AppLocker / WDAC / Defender

4. Confirm Edge Components Are Not Disabled

WebView2 depends on Microsoft Edge components.
If Edge is removed or disabled via Group Policy, WebView2 will fail silently.

Notes

• WebView2 requires the x64 runtime, even if the application is 32-bit.

• Running the application as Administrator does not resolve this issue.

• If the runtime is correctly installed and not blocked, the .WebView2 folders will be created automatically on application launch.

Verification

After successful runtime installation:

• Launch the application

• Confirm that the .WebView2 folders are created

• Confirm embedded browser content loads correctly

If the issue persists after completing the above steps, the problem is likely related to:

• OS image configuration

• Enterprise security policy

• WebView2 runtime registration failure

How to reconnect to work instruction folders

If your work instructions are located on a shared network drive, sometimes the connection can be lost, meaning no images are displayed when the Tascus sequence runs. We've now added features to check and retry to connect.