GUI stuck help please

[Need_O2]

• takecontrol
  • Events
    • Player - Player 1 (Red) Selects a unit
    • Player - Player 2 (Blue) Selects a unit
    • Player - Player 3 (Teal) Selects a unit
    • Player - Player 4 (Purple) Selects a unit
    • Player - Player 5 (Yellow) Selects a unit
    • Player - Player 6 (Orange) Selects a unit
  • Conditions
    • (Unit-type of (Triggering unit)) Not equal to Builder Camp 1
    • (Unit-type of (Triggering unit)) Not equal to Blue Dragon Roots
    • (Unit-type of (Triggering unit)) Not equal to Farm
    • (Unit-type of (Triggering unit)) Not equal to Fruit Stand
    • (Owner of (Triggering unit)) Not equal to (Triggering player)
    • ((Triggering unit) is A structure) Equal to True
    • (PlayerRegion[(Player number of (Triggering player))] contains (Triggering unit)) Equal to True
  • Actions
    • Set Temp_Group = (Units currently selected by (Triggering player))
    • Unit Group - Pick every unit in Temp_Group and do (Actions)
      • Loop - Actions
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • prevselect[(Player number of (Triggering player))] Equal to (Picked unit)
            • (Unit-type of (Picked unit)) Not equal to Builder Camp 1
            • (Unit-type of (Picked unit)) Not equal to Blue Dragon Roots
            • (Unit-type of (Picked unit)) Not equal to Farm
            • (Unit-type of (Picked unit)) Not equal to Fruit Stand
            • (Owner of (Picked unit)) Not equal to (Triggering player)
            • ((Picked unit) is A structure) Equal to True
            • (PlayerRegion[(Player number of (Triggering player))] contains (Picked unit)) Equal to True
          • Then - Actions
            • Unit - Create 1 Take Effect for (Owner of (Triggering unit)) at (Position of (Picked unit)) facing (Center of (Playable map area))
            • Unit - Add a 2.50 second Generic expiration timer to (Last created unit)
            • Unit - Change ownership of (Picked unit) to (Triggering player) and Change color
          • Else - Actions
            • Set prevselect[(Player number of (Triggering player))] = (Picked unit)
            • Wait 1.00 seconds
            • Set prevselect[(Player number of (Triggering player))] = |c000996FFSummoning Hall|r 0038 <gen>
    • Custom script: call DestroyGroup (udg_Temp_Group)
    • Wait 1.00 seconds
    • Set prevselect[(Player number of (Triggering player))] = |c000996FFSummoning Hall|r 0038 <gen>

This is a take control of others building in your region trigger
perfromes with double click on target building
This trigger makes units to get locked sometimes
I want you to give a simple code or fix if there are some errors (prevselect is a dummy variable btw)
NOT neccesary but it would be good