Help:Installation/Troubleshooting/PHP Fatal error: Cannot redeclare class SemanticMediaWiki


 * PHP Fatal error&#58; Cannot declare class SemanticMediaWiki."CiteRef::gh:smw:3984

This issue appears if you run  from within Semantic MediaWiki's extension directory instead of the from the base directoryCiteRef::install:base:dir of your MediaWiki installation.

Please follow the installation instructions as outlined to mitigate the issue.