[SOLVED]No "missiongroup" found in mission. error

So i was in the process of making a nice local track layout had everything nice and smooth,then as i was trying to move some nodes around i mistakenly made the nodes be invisible working but invincible,i was trying to figure out how to get the nodes back to be visible so i know were to grab them,i got nervous and didn't want to lose my progress so i saved the map,i had first saved by selecting save as and giving it a name then after that i would save by just hitting save since the map i was working on was already loaded,well i turned off the game and when i went to start back up to continue my map i select my map and it starts loading and then bam it throws this error on the picture attached,No"missing group found in mission" i am very frustrated since i have already had spent hours making everything really smooth,and to start all over would really suck,any help will be greatly appreciated.

P.S. if anyone knows what i accidently pressed to make the nodes on the road invisible would appriate to know how to make them appear again.

- - - Updated - - -

Ok i found what makes nodes appear and disappear is (Shift + Z) and i figured out why my track was not loading.

Mods you can lock this.