SeoTools Blocked by Akamai?

Our IT team has recently implemented Akamai's CDN for our domain, PenFed.org. Since then, we can no longer use SeoTools on PenFed.org. Even basic functions such as this fail:
=HttpStatus( "https://www.penfed.org/" )

We've tried using different user-agents, proxies, etc, but nothing has worked. We have no problems using our other tools such as Screaming Frog. Is there anything that can be changed in how SeoTools makes its http queries?

Otherwise, can anyone suggest a workaround?