i am currently having this issue. i am on windows 11
The taskbar is not skinning.
Sorry to hear you are having issues. From what I experience, since Windows 11 recent updates, but, I am not sure which update it was, I need Stardock's Start11 installed to have Taskbar be skin by Windowblinds. Might be due to Windows keep changing its taskbar UI.
Stardock Community Assistant.