https://community.sophos.com/email-appliance/f/discussions/109302/sophos-notification-sea---cannot-select-cert-invalid-range-for-key-selectorHi Everyone, Customers are not able to add or renew certificates. Usage of existing certificates is not affected. When trying to apply a new certificate an error will be displayed in the Admin UI of: &quot;invalid range for key selector [4-255]&quot; Pleaseen-USTelligent Community 12https://community.sophos.com/thread/392257?ContentTypeID=1Mon, 17 Dec 2018 18:41:15 GMT4be5eb7d-caa4-4ff5-8e60-8f9463545a35:629a80dc-d663-4deb-925d-b13fd2f21543FloSupport<p>[Update] This issue is resolved in <a title="http://sea.sophos.com/rn/sea/concepts/ReleaseNotes_4.5.0.1.html" href="http://sea.sophos.com/rn/sea/concepts/ReleaseNotes_4.5.0.1.html" target="_blank">v4.5.0.1</a></p> <p>Regards,</p><div style="clear:both;"></div>