Black rectangles when sharing screen

Unfortunately, all the above is as required, and I still get black rectangles. When I share the presentation, I get a big black rectangle covering almost the whole screen - when I share the screen, I get black rectangles where there are zoom windows on my screen. I use zoom for training other people and it has become impossible to use.

Here is what I found:

To enable or disable Showing Zoom windows during screen share for all users in the account:

1. Sign in to the Zoom web portal as an admin with the privilege to edit account settings.
2. In the navigation panel, click Account Management then Account Settings.
3. Click the Meeting tab.
4. Under In Meeting (Basic), click the Showing Zoom windows during screen share toggle to enable or disable it.
5. If a verification dialog displays, click Enable or Disable to verify the change.
6. (Optional) If you want to make this setting mandatory for all users in your account, click the lock

    icon, and then click Lock to confirm the setting.

7. Sign out of the Zoom desktop app and sign back in.
   Alternatively, you can exit the client and re-open it.
8. Click your profile picture, then click Settings
9. Click Share Screen
10. Verify that the Show my Zoom Windows to other participants when I am screen sharing check box is selected.