Unity 2019.2 can't locate ndk or use ndk

I have been trying to get this fixed but nothing helped. i tried linking a new direcotory. already annoying that it searches for itself and it doesn't open finder so i can put mine in. both the one with unity hub installed and the one i linked don't get recognised. after that i downloaded the newest r19 NDK and put it in the NDK folder of the editor and placed the preinstalled away. but yet again nothing.

how can i fix this? it only happened after going from 2018.3 to 2019.2 . i didn't update for a long time. i still have version 2018.3 located on my internal drive. and the 2019.2 is on my external drive. if that is info that helps. it's annoying cause i can't do anything right now.