Need assistance with xposed.

I have a rooted Samsung Galaxy s5, i have knox frozen in titanium backup so it shouldn't cause any issues when installing.

it's been ages since i rooted my phone so i do not remember what rom i used and so on, that's where the help comes in.

I do not update my phone ever and have disabled system messages.

Model Number: SM-G900F

Android Version 5.0

Baseband version: G900FXXU1BOH4

Kernel Version: 3.4.0-5508620
dpi@SWHD7404 #1
mon august 10 KST 2015

Build Number: LRX21T.G900FXXU1BOH4

SE for android status: Enforcing
SEPF_SMG900F_5.0-1_0032 mon august 2015

Security software version: MDF v1.1 release 4, VPN v1.4 release 3

Knox version: Knox 2.3
Standard SDK 5.3.0
Premium SDK 2.3.0
Customization SDK 2.0.0
Container 2.3.0
IM 2.0.0

lots more if needed ask
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I just wrote it all down in case its needed.