Graymail Quick Action link label query param invalid for action

https://protection.inkyphishfence.com/report?id=[SOME REPORT ID]&label=safe&quick=1&graymail_sender=1#key=[SOME KEY]

When the page loads it shows a prompt with the following text.

'You are about to report this email as: Safe'
But then also says.
'Are you sure you want to add the following personal block list entries?'

Your web team needs to add support for a label of ‘graymail’ as well as fix the quick link in the banner.