Upgrading MW 1.30 SMW 2.5.5 Causing issues with SPARQL queries
> SPARQL Query Interface gives me an error: [WmDHqtKcgwqPmABhkD@9CwAAAAY] 2018-01-18 16:13:30: Fatal exception of type "Exception"
"SPARQL Query Interface" is not part of SMW and  indicates it to relate to the LinkedWiki extension. As per , the issue seems to be solved and you should report back to this site if an issue has been solved to avoid unnecessary volunteer time on issues no longer relevant.
As for the `Fatal exception of type "Exception"`, please review  of how to report issues regarding information required for those that involve an "Exception".