Minecraft Multiplayer keep crashing

I don't know why my Minecraft keeps crashing every time I click the multiplayer button in any 1.8 Minecraft version I've already tried deleting serve.data but it still crashing every time I Add a server.

I chose 1.15.1 on affects version just because it doesn't let me choose  1.8.

Please, I beg u guys could help me to solve this problem because I wasn't able to play with my friends for weeks.