As it's already in the title, my Minecraft multiplayer mode does not work anymore, and I do not know why! For some time I have not played Minecraft anymore, I play Minecraft with 1.8.9 Optifine! And I could join almost every server. But lately, the game always fails when I click on any server z.b "Griefergames" on it! I even got Optifine and my shaderpacks from the minecraft. Folder pulled out, but it does not help! Please help me!
As a last hope, I would otherwise delete the Minecraft folder and reinstall. But only if nothing else works.
Change your DNS Sevrer to 9.9.9.9 and 1.1.1.1
check your virus protection.
Sometimes it's the Internet, you do not always think so deeply.
Disconnect -> connect