When I try to share my self-hosted website (www.veffa.org/vnbookdrive) on Facebook, the logo isn't shown as I expect:
When search for the solution, I come up with this tutorial in YouTube. So I go to the Facebook Object Debugger and enter my site. It turns out that it does get an image, the only thing is that image is white, and I don't know where it is on my site:
So do you have any idea where is this image? And how should I fix it?