It seems Minecraft players aren't happy with the Java Edition's new Minecraft Launcheras it's causing a multitude of issues in the 3D Sandbox game. Although this launcher was introduced to give PC players more accessibility to the game, many are reporting difficulties with the launcher where the game fails to start, takes a long time to load, or does not load at all.
In an example, Minecraft players have reported the error message: "Launching the game failed! Unable to copy file. Error details:
Read more on gamerant.com