Yes, try to reflash twrp. I used safe root to reroot after running the MK2 stock tar last week and used goo manager to install twrp with no problems so it does work. Try again.
Phones & Tablets: Galaxy S4, Galaxy Note 8", Evo 4g LTE, Evo 3D, Acer Iconia A500, Samsung Galaxy Tab 2 10.1, Ipad 2, Nabi 2,
Rom: Rooted Stock Odexed, Hotspot Mod, Xposed, Wanum, several other xposed tweaks