Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
      File "/usr/lib/python3.14/site-packages/sphinx/ext/intersphinx/_load.py", line 132, in validate_intersphinx_mapping
        raise ConfigError(msg)
    sphinx.errors.ConfigError: Invalid `intersphinx_mapping` configuration (1 error).
The snippet shows error in the sphinx configuration file. 