Perrock

i have exactly the same problem.. and i dont have a lot of mods.. i have Tweak Scale kerbal engineer Fuel Wings automated science sampler Manuver node evolved doking port alignment Trajectories Easy Vessel Switch Kerbal Alarm Clock Precise Node so basicly all practical and gameplay mods .. but when i install Transfer Window planner happens this bug.. i try every mod individualy and all of them work.. i only get this bug with this particular mod.. did some one get a solution for this? i have KSP 1.7.1 breaking ground and making history dlc.. i would like to use this mod its really useful but keep F...king up my game zorry for my english