User-specified path (source/fundamentals/builders/builders-data-classes.txt,source/fundamentals/data-formats/document-data-format-bson.txt,source/fundamentals/data-formats/serialization.txt,source/fundamentals/encrypt-fields.txt,source/includes/fundamentals/code-snippets/bson-gradle-versioned.rst,source/includes/fundamentals/code-snippets/bson-maven-versioned.rst,source/includes/fundamentals/code-snippets/crypt-gradle-versioned.rst,source/includes/fundamentals/code-snippets/crypt-maven-versioned.rst,source/includes/serialization-libs-gradle-versioned.rst,source/includes/serialization-libs-maven-versioned.rst) is invalid; falling back to 'all'.