Why my Translucent Taskbar not working any more?

Check Windows Settings:

Personalization Settings: Right-click on the desktop and select Personalize. Go to Colors and make sure the Transparency effects toggle is turned On.
Dark Mode: Sometimes using Dark Mode makes the taskbar less translucent. Try switching between Light and Dark modes to see if it changes.

2. Update Windows:

Ensure your Windows operating system is up to date. Sometimes updates fix bugs that might be causing issues with UI elements.
Go to Settings > Update & Security > Windows Update and check for updates.

Right-click on the Desktop and select Personalize. Go to Colors. Make sure the option "Transparency effects" is turned on. If it's off, toggle it on to see if that restores the translucency of your taskbar.

Sometimes, simply restarting the translucency application can resolve any temporary issues. Close the application completely and restart it.

Make sure your Windows is up to date. Go to Settings > Update & Security > Windows Update and check for updates.

If the translucent taskbar in Windows 11 isn’t working, start by checking your personalization settings. Go to Settings > Personalization > Colors, and ensure Transparency effects is enabled.

If the TranslucentTB not working on Windows 11 error happens because of insufficient permissions, you should run Translucent as administrator to get rid of the error. To do that, right-click on the TranslucentTB icon and choose the Run as administrator option from the context menu.