[HOOK - conan-center.py] pre_export(): WARN: [RECIPE METADATA (KB-H003)] Conanfile doesn't have 'topics' attribute. 
[HOOK - conan-center.py] pre_source(): ERROR: [IMMUTABLE SOURCES (KB-H010)] Create a file 'conandata.yml' file with the sources to be downloaded. (https://github.com/conan-io/conan-center-index/wiki/Error-Knowledge-Base#KB-H010) 
ERROR: [HOOK - conan-center.py] pre_source(): Some checks failed running the hook, check the output