With v15R introducing a new license system this also affects building. When using a normal version of 4D such as v15.0 the license to use when building is the typical licenses used, but when using the R releases, the licenses used when build have to be the R ones which are the licenses prepended by the "R-" suffix.

Each respective version must use the respective type of license if not then a "No license is installed." error will appear even though there does seem to be the correct ones:


When in the Licenses & Certificates tab, confirm that the right licenses is selected by looking at the Path and not the number, as it may show the number without the "R-" prefix: