Compilation failure

[KleinDevDE]

Informations

Branch: master
Java jre: 1.8.0_221
Eclipse version: Photon Release 4.8.0 (Build id: 20180619-1200)

Failures in eclipse

Eclipse Smarthome cannot be installed with version 2020-03 or 2019-12.
According to some comments the installation works on Eclipse Photon.
Well, the installation itself worked fine, but some projects throw errors (616 errors and 302 warnings).
Most errors are about "cannot resolved to be a type".

I installed Eclipse Smarthome about an hour ago, nothing was changed by me.

Like: 
ModelItem cannot be resolved to a type.
/org.eclipse.smarthome.model.item/src/org/eclipse/smarthome/model/validation/ItemsValidator.xtend

Failures in maven

Used privatebin cause pastebin has a paste limit to 256kb.

Try 1

mvn clean install > log.txt

--> See log: https://privatebin.net/?e5563e52cf21c9b8#3V2DhqxKhV3U2FRxNgqoiedtqncEDk5SCqqx1pj1BbKF

---

Try 2 - Thank's to #4305

mvn clean install -DskipChecks=true -DskipTests=true > log2.txt

--> See log: https://privatebin.net/?848410a1507d799f#77PHVkWa8kxvCGeUbyLXzYGtPXAxtckHKvP4ww8EZkWz

---

Try 3

mvn clean install -e -X > log3.txt

--> See log: https://privatebin.net/?a79f06c59a999b43#ARfmNqeBfpfG27ewhYecyT4kG4yDhKBoab3zuKnTV48

Also the branch "0.10.x" gives me the same error like try1 and try2.

[5iver]

This repo is no longer maintained. See #6883 .

[KleinDevDE]

Okay thanks