I upgrade from version 2.9 to the latest current version and the process went well however some avatars are not showing up.
「いいね！」 1
Hi Islam 
Do you notice a pattern in the avatar that doesn’t appear (like only customized avatars for example)?
Are there any errors in the JS console in your browser’s development tools?
「いいね！」 2
Hello Coin,
There is no errors in the JS console.
I cannot identify if there is a pattern because there are thousands of users.
I ran the command rake avatars:refresh but it didn’t help.
「いいね！」 2
Requests like /user_avatar and /admin/reports/bulk fails with HTTP 504.
I’m running 3.1.0.beta3 and this issue happened after the upgrade.