bg iamge cannot be changed

Hi there,

first off you must be using the Block Editor ( Not Classic Editor ).
Edit the Home Page - select the first Container Block, in settings > Background you cant then select a new image.

Thank you! I have tried to replace the images with File Manager.
Then I have tried your method and it also works.
Using Block Editor is easier. But I am still more familiar with the classic editor.
I have changed back to classic editor after the problem is solved. Thanks

You're welcome
For the landing pages - in that site you may be best leaving them as Block Editor - and just switch your posts and other new pages to Classic :)