[Pushed] Use avatar url not work

[ATofighi]

I'll create a PR for this after it's pushed.

[Omar G.]

Hi,

Thank you for your report. We have pushed this issue to our Github repository for further analysis where you can track our commits and progress with fixing this bug. Discussions regarding this bug may also take place there too.

Follow this link to visit the issue on Github: https://github.com/mybb/mybb/issues/982

Thanks for contributing to MyBB!

Regards,
The MyBB Group