I wanted to play minecarft, I took version 1.15.2 Optifine and pressed save but it says sorry unable to start minecraft please check your configuration please need help
Maybe the wrong Minecraft version (if you use the Optifine mod). If this is not the case, you could send a screenshot of the Minecraft log. You could also try reinstalling the Forge version.
Please send the entire error log and also the configuration. Otherwise you can't be helped because it can have too many different causes.
And please don't just post here, but upload to pages like https://hasteb.in/ or https://pastebin.com/ ^^
As far as I know there's still no OptiFine 1.15.2: 0