build quest2 failed with gradle exception

I've posted my question in the unity forum:https:    //forum.unity.com/threads/      build-quest2-failed-with-gradle-exception.1022092/

I'm so sorry not post the detailed problem here.the forum tool is too hard to use.I don't want pay too much time to post it again.

unity version:2019.416fc1 Personal

sdk:

unity for 2019.4 needs build-tools of version 28

unity for 2019.4 needs ndk of version 19.0.5232133,but I can't find the version from google.I have to modify the source.properties:
Pkg.Revision = 19.0.5232133

unity for 2019.4 needs sdk-platforms of version 28

unity for 2019.4 needs gradle of version 5.1.1.

error message:

after I click Build button(I have downloaded some missing jar files and pom files from mvnrepository)，after a few seconds,I got the following error message:

I got too many errors.I have no idea how to reslove this problem.

Can anybody help me？ Thank you very much.