I downloaded Release v2.24.0
followed instructions in the INSTALL.md
installed Qt 5.9.5 (Ubuntu Linux)
tried to build, it still failed because the code tried to access QNetworkInterface::type() which doesn't exist in Qt 5.9.5
The code built successfully when I removed Qt 5.9.5 and installed Qt 5.15.2
I downloaded Release v2.24.0 followed instructions in the INSTALL.md installed Qt 5.9.5 (Ubuntu Linux) tried to build, it still failed because the code tried to access QNetworkInterface::type() which doesn't exist in Qt 5.9.5
The code built successfully when I removed Qt 5.9.5 and installed Qt 5.15.2