I’ve updated discourse to 2.2.0.beta8.
But it always reports a problem:
Your site is missing a 512 × 512 icon, which allows users to add a home screen shortcut to this site on Android devices. Go to the Site Settings and upload a 512 × 512 icon.
I tried a random picture which is not 512 * 512, the problem remains.
I tried to download a 512 * 512 picture, but the problem still remains.
So, how can I solve the problem?
Fine, I see the picture is not exactly 512 * 512.