MSFN is made available via donations, subscriptions and advertising revenue. The use of ad-blocking software hurts the site. Please disable ad-blocking software or set an exception for MSFN. Alternatively, register and become a site sponsor/subscriber and ads will be disabled automatically.
I fixed it. Right click on the taskbar. Click on Taskbar Settings. Go to the Start Menu settings (on the left-hand side) Turn on Use Start full screen. Lave the settings and display your start menu as full screen. Go back to the settings and turn Use Start full screen back off.