Cooking/Compiler Error

Hello Guys,

I am trying to make a map, but everytime when i will cook the map, i get this error:

[2020.08.01-14.02.24:310] 0]LogBlueprint:Warning: [compiler] Warning This blueprint (self) is not a HUDElementBarWidget, therefore ’ Target ’ must have a connection
[2020.08.01-14.02.24:310] 0]LogBlueprint:Error: [compiler] Error Variable node Set bBoostIconHidden uses an invalid target. It may depend on a node that is not connected to the execution chain, and got purged.
[2020.08.01-14.02.24:310] 0]LogBlueprint:Error: [compiler] Error Failed to find class for pin Element Bar
[2020.08.01-14.02.24:315] 0]LogBlueprint:Warning: [compiler] Warning [0432.49] Compile of Buff_TekArmor_Shirt_Rework failed. 2 Fatal Issue(s) 1 Warning(s) [in 125 ms]

I even looked at the blueprint, everything was ok and recompile it, it gives me no error, but when i try to cook it again, i am getting this error again.

I hope someone can help me pls