You might just be unlucky with your timings
Azhrei is putting the 22.214.171.124 build as we speak and I know he hasn't merged everything together yet. So the 126.96.36.199 build isn't ready yet.
PS: Any development and/or building I am currently doing I am doing from the "1.4.1-dev-branch" branch which I am running with Java 8
To add some additional info to the install process when following the directions.
1) In the first part of the "Install Eclipse IDE for Java EE Developers" section, adding the default path to the Java 9 JDK:
causes Eclipse to fail to load. So had to skip that step.
2) Under the "Install Eclipse Gradle Plugins." sections... one of the files (I want to say something from "Sourcetree"?) does not download and install.
3) Under the "Build the Maptool Gradle Project" section it says to select "Gradle Project". It really says "Select. Chose Import Wizard" and there is a list of subfolders, two of which are "Gradle" and "Gradle (STS)". There is no "Build Model" option under "Gradle" so I selected "Gradle (STS)." However...
4) When loading Eclipse it warns:
The STS Gradle plugin is under minimal maintenance and may be discontinued in the future.
A document explaining the migration process from STS Gradle to Buildship can be found here.
Not sure what, if any, of those issues is a contributing factor.