Azure Web Application Firewall failed to deploy

Hi,

I cannot deploy <g class="gr_ gr_13 gr-alert gr_gramm gr_inline_cards gr_run_anim Grammar multiReplace" data-gr-id="13" id="13">a HTTPS-enabled</g> Application Gateway in South Central US. However, I am able to open the resource after that and it displays a "Failed" red bar. I've been facing this issue since last week.