I have two polygon layers : "Building foortprints" and "Building buffer" (which is a buffer around each building and they do overlap each other). I want to calculate the sum area of all buildings in each buffer. I tried to use Summarized Within tool in ArcGIS Pro, but it gives me error 99999. I guess because the buffers overlaps, it cannot run the tool succesfully.
Is there any way that I can do this calculation in QGIS?
For example in the below image, for each building's buffer I should have the sum of three other buildings area.