Please make sure that you're using the latest tweaker version. If that doesn't solve the problem, please provide your tweaker version, the version of your explorer.exe file, and the exact error message that you're getting.

Fixed in v5.10.

Changed in v5.10 per your suggestion, thanks.

Fixed in v5.10.

Fixed in v5.10.

Fixed in v5.10.

Fixed in v5.10.

Support was added in v5.10.

I might be able to implement that. When that happens, if you close and re-launch the tweaker, does the taskbar become narrow again?