I do have 3.82 installed and updated with SDK manager once (API 19).
Than came this error message.
Started SDK manager twice, he wants to install API 20 ff - and Tools 20.x
I don't want API 20, but checked all 20.x Tools, where before checked as 19.x
Install and ... quit
Started SDK manager third, and deinstall the doubles from 19.x tools.
Checked my paths in B4A and now it works again.