Hero Image Block
If you use this block, your main row layout is must in full width stretched and the background image is set in the row option, not in block option.
To get the block linked to another block, you might know what your targeted blocks ID. You can check it by inspect element and find the parent ID, or you can add your targeted block a custom class by accessing: Targeted block > Widget Style > Attributes > Widget Class. Then after fill it, back to hero image > Section to link and insert the class or id. Example: #pg-1808-1 for ID, and .about for class.
This block have 3 different type:
Full Height With Border
Hero Image With Logo
Hero Image With Button