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conan install rmlui/3.3@ --profile=C:\J\w\BuildSingleReference@2/9110/10e30eb9-61dd-4eff-b28c-d48dbaa5423d/profile.txt --build=rmlui
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Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=Visual Studio
compiler.runtime=MD
compiler.version=15
os=Windows
os_build=Windows
[options]
rmlui:shared=False
[build_requires]
[env]

rmlui/3.3: Forced build from source
Installing package: rmlui/3.3
Requirements
    bzip2/1.0.8 from 'conan-center' - Cache
    freetype/2.10.1 from 'conan-center' - Cache
    libpng/1.6.37 from 'conan-center' - Cache
    rmlui/3.3 from local cache - Cache
    zlib/1.2.11 from 'conan-center' - Cache
Packages
    bzip2/1.0.8:5be2b7a2110ec8acdbf9a1cea9de5d60747edb34 - Cache
    freetype/2.10.1:bc24ecb3030892e9e91d30c72873e53de96982f6 - Cache
    libpng/1.6.37:606fdb601e335c2001bdf31d478826b644747077 - Cache
    rmlui/3.3:c1439b07cd991cb0292f443a575be4383dd696f0 - Build
    zlib/1.2.11:6cc50b139b9c3d27b3e9042d5f5372d327b3a9f7 - Cache

Installing (downloading, building) binaries...
bzip2/1.0.8: Already installed!
bzip2/1.0.8: Appending PATH environment variable: C:\J\w\BuildSingleReference@2\.conan\data\bzip2\1.0.8\_\_\package\5be2b7a2110ec8acdbf9a1cea9de5d60747edb34\bin
[HOOK - conan-center.py] post_package_info(): [CMAKE FILE NOT IN BUILD FOLDERS (KB-H019)] OK
[HOOK - conan-center.py] post_package_info(): [LIBRARY DOES NOT EXIST (KB-H054)] OK
zlib/1.2.11: Already installed!
[HOOK - conan-center.py] post_package_info(): [CMAKE FILE NOT IN BUILD FOLDERS (KB-H019)] OK
[HOOK - conan-center.py] post_package_info(): [LIBRARY DOES NOT EXIST (KB-H054)] OK
libpng/1.6.37: Already installed!
[HOOK - conan-center.py] post_package_info(): [CMAKE FILE NOT IN BUILD FOLDERS (KB-H019)] OK
[HOOK - conan-center.py] post_package_info(): [LIBRARY DOES NOT EXIST (KB-H054)] OK
freetype/2.10.1: Already installed!
[HOOK - conan-center.py] post_package_info(): [CMAKE FILE NOT IN BUILD FOLDERS (KB-H019)] OK
[HOOK - conan-center.py] post_package_info(): [LIBRARY DOES NOT EXIST (KB-H054)] OK
rmlui/3.3: Copying sources to build folder
rmlui/3.3: Building your package in C:\J\w\BuildSingleReference@2\.conan\data\rmlui\3.3\_\_\build\c1439b07cd991cb0292f443a575be4383dd696f0
rmlui/3.3: Generator cmake_find_package created FindFreetype.cmake
rmlui/3.3: Generator cmake_find_package created FindPNG.cmake
rmlui/3.3: Generator cmake_find_package created FindBZip2.cmake
rmlui/3.3: Generator cmake_find_package created FindZLIB.cmake
rmlui/3.3: Generator cmake created conanbuildinfo.cmake
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] 'fPIC' option not found
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK
rmlui/3.3: Calling build()
rmlui/3.3: 
rmlui/3.3: WARN: Build folder is dirty, removing it: C:\J\w\BuildSingleReference@2\.conan\data\rmlui\3.3\_\_\build\c1439b07cd991cb0292f443a575be4383dd696f0
rmlui/3.3: ERROR: Package 'c1439b07cd991cb0292f443a575be4383dd696f0' build failed
rmlui/3.3: WARN: Build folder C:\J\w\BuildSingleReference@2\.conan\data\rmlui\3.3\_\_\build\c1439b07cd991cb0292f443a575be4383dd696f0
ERROR: rmlui/3.3: Error in build() method, line 108
	self._configure_cmake().build()
while calling '_configure_cmake', line 68
	cmake_version = tools.Version(cmake_version_output.getvalue().split('\n', 1)[0].rsplit(' ', 1)[-1])
	ConanException: Invalid version ''