Membership 2 Pro Coupon PHP 7.1.3 Compatible?

Is the Coupon Addon for Membership 2 Pro PHP 7.1.3 compatible? I ask because Coupon worked fine previous to server upgrade to PHP 7.1.3.

Now, upon coupon application at registration, I get a Fatal Error citing Coupon code, etc.

I thought I'd ask before trying registrations/coupon application with a downgraded PHP install, i.e. PHP 7.0, etc.