wont let me update to current version

I am trying to join a minecraft server i made, but says outdated client and i should use 1.16.3

so I go to my launcher and enter installations to make one with 1.16.3

but i cant update to 1.16.3 because the versions are just WIPED!!!

WHY DID THIS HAPPEN!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

sencirley,

minecrafrpr0_10

(this is my minecraft username)