Project does not compile

[GeorgFette]

Hello,
I have problems in compiling the project. I use IntelliJ 2017.3.4. I checked out the project via Git checkout.
The first problem I noticed is that the include of the 3rdparty-project does not contain its parent folder "library" so the gradle task "build" on the 3rdparty-project does only work when the gradle.settings of the root ehrservice project are changed to "libraries/3rdparty".
But now I get exceptions when compiling the project knowledge-cache:
D:\Code\ehr\ehrservice\knowledge-cache\src\main\java\com\ethercis\ehr\knowledge\KnowledgeCache.java:24: error: package org.apache.velocity.io does not exist
import org.apache.velocity.io.UnicodeInputStream;
When checking my local .m2-directory the velocity jar with version 1.5 as required does exist. I do not understand why he can't resolve the UnicodeInputStream class.
Does anyone understand these problems ? Perhaps I just did something wrong while checking out and importing the whole project.
Greetings
Georg