Android Question Notifications Builder class (2018) example problem in release mode.

Hi, guys

Just tried to using NB6 - Notifications Builder class (2018) example and have a problems.

In debug it is ok, but when a try to compile a release version, I get the following error
B4A Version: 8.30
Parsing code. (0.01s)
Compiling code. (0.11s)
Compiling layouts code. (0.01s)
Organizing libraries. (0.97s)
Generating R file. (0.21s)
Compiling generated Java code. (1.60s)
Convert byte code - optimized dex. (6.40s)
Packaging files. Error
AAPT path: C:\Android\tools\..\build-tools\23.0.3\aapt.exe
Exit code:-1073741819

I am using B4A V8.30 and the code is unmodified.
Can anybody help?

Dave