FAILURE: Build failed with an exception about tsunami-security-scanner HOT 3 CLOSED

Building portscan/nmap ...

> Task :compileJava FAILED
/home/ubuntu/tsunami/repos/tsunami-security-scanner-plugins/google/portscan/nmap/src/main/java/com/google/tsunami/plugins/portscan/nmap/NmapPortScanner.java:167: error: incompatible types: Optional<String> cannot be converted to NetworkService
                              && NetworkServiceUtils.isWebService(getServiceNameFromPort(port))) {
                                                                                        ^
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
1 error

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':compileJava'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 1s
1 actionable task: 1 executed

ubuntu@tsunami---ubuntu18:~/tsunami$ javac -version
javac 11.0.8
ubuntu@tsunami---ubuntu18:~/tsunami$ nmap --version
Nmap version 7.80 ( https://nmap.org )
Platform: x86_64-redhat-linux-gnu
Compiled with: nmap-liblua-5.3.5 openssl-1.0.2s nmap-libssh2-1.8.2 nmap-libz-1.2.11 nmap-libpcre-7.6 nmap-libpcap-1.9.0 nmap-libdnet-1.12 ipv6
Compiled without:
Available nsock engines: epoll poll select