Minecraft modpacks do not start on Twitch?

I downloaded the Twitch app to play Minecraft Stoneblock 2, but after increasing my RAM to 6144MB, Minecraft does not appear. Java is entered as a background process in Task Manager.

If I create a custom profile via Twitch with only Forge 1.12 then it starts normally. Could someone help me there, thanks in advance.

Starts as soon as you press play nothing?

If yes try it with the alternative launcher, you can also change in the settings if you like the new or the old java launcher use. Maybe the easiest way.

You should also check if you have the latest java version installed

When I click on Start, the new Minecraft Launcher opens, but when I click on Games - in the Launcher - it says, "The game is already running" or it does not open.

Here is a picture of what happened after I clicked on games.

Yes, then try as I said the old java launcher in the settings to change, that should help

Even then nothing starts. Even after a long wait.