Minecraft Life in The Woods - Java Checksum Check failed?

Have a problem installing Minecraft: Life in The Woods via the Litw Launcher.

I have the latest version of Java.

My approach:

-Download Life in The Woods Europe Launcher

- Unzip

-in "windows" start the "install.bat"

- Confirm pop ups

-Desktop shortcut appears

-Start the shortcut

-Launcher opens

-Initialization successful

-Press Install

-Error message appears after 2 seconds "Java Checksum Check failed"

Would be really grateful if someone could help me

I had also not had anything to do with Life in The woods on this PC before, it is practically "remodeled".

Normal Minecraft goes without any problems.

I have exactly the same problem!

I also say "Java Checksum Check failed" + the console closes after I click on "install.bat". (Windows folder)

If you already got it fixed, it would be cool if you let me know how you did it!

Download the Technic Launcher.

Then go to Launcher Options in the top right corner and set the RAM to at least 8 GB under Java Options. Then search for "After Humans" in ModPacks, install it and then click on games.

This is the Life in The Woods expansion pack from Gronkh (The Official).