Hello @Marika251913571vze, you still should be able to do so by creating Color Range mask. In Loupe Edit mode, select Masking, then tap on the blue "+" icon and select Color Range from the list. Drag the circular pointer on the photo to select color for your mask and adjust the selected color area using Refine slider. Once Color Range mask is created, you could do other adjustments using tools displayed on the bottom of the Masking.
Hello @Marika251913571vze, could it be that you're seeing red masking overlay on your photo? After you dragged the circular pointer and adjusted selected Color Range area using Refine slider, tap Apply button. This should create a color range mask on your photo (shown as a red overlay). Now, you could select "Color" option on the bottom panel and change the color of the color range area you've selected.