You must have git-lfs installed before cloning the repo in order to build from source. Otherwise only the pointer file is cloned.

For example, without git-lfs the gradle/wrapper/gradle-wrapper.jar local file contents are below, and ./gradlew build fails with an uninformative error.

# cat gradle/wrapper/gradle-wrapper.jar
version https://git-lfs.github.com/spec/v1
oid sha256:e996d452d2645e70c01c11143ca2d3742734a28da2bf61f25c82bdc288c9e637
size 59203

# ./gradlew build
Error: Could not find or load main class org.gradle.wrapper.GradleWrapperMain
Caused by: java.lang.ClassNotFoundException: org.gradle.wrapper.GradleWrapperMain

I'm on Ubuntu and can install git-lfs with sudo apt install git-lfs. I can check that it's installed with which git-lfs. I'm not sure how to make that portable across platforms though.