Attempting to Install Systemless Xposed Fails and Removes Root

So I'm currently rooted using Systemless SuperSu 2.67 which I flashed using TWRP 3.0.0 (installed by Odin 3.11). I've been trying to install the Systemless Xposed Framework (required for me since I'm using a Samsung Galaxy S7 G930W8). Regardless of whether I use Rom Manager, Flashfire or TWRP to install the Systemless Xposed Zip, the process always completes but after my phone reboots the Xposed Framework is not installed (shown as not active or installed in the Material Design Installer) and my root no longer works aswell. Is there any way for me to install the Xposed framework on my phone without having it fail and losing my SuperSU root?

Thanks.

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