Exception encountered, of type &quot;Error&quot;<br />
[71d18e31] /api.php?action=logout   Error from line 653 of /www/vlsiwiki.soe.ucsc.edu/htdocs/includes/exception/MWExceptionHandler.php: Class 'FormatJson' not found<br />
Backtrace:<br />
#0 /www/vlsiwiki.soe.ucsc.edu/htdocs/includes/exception/MWExceptionHandler.php(241): MWExceptionHandler::logError(ErrorException, string)<br />
#1 /www/vlsiwiki.soe.ucsc.edu/htdocs/includes/AutoLoader.php(90): MWExceptionHandler::handleError(integer, string, string, integer, array)<br />
#2 /www/vlsiwiki.soe.ucsc.edu/htdocs/includes/AutoLoader.php(90): require()<br />
#3 [internal function]: AutoLoader::autoload(string)<br />
#4 /www/vlsiwiki.soe.ucsc.edu/htdocs/includes/api/ApiFormatJson.php(78): spl_autoload_call(string)<br />
#5 /www/vlsiwiki.soe.ucsc.edu/htdocs/includes/api/ApiMain.php(1385): ApiFormatJson-&gt;execute()<br />
#6 /www/vlsiwiki.soe.ucsc.edu/htdocs/includes/api/ApiMain.php(1243): ApiMain-&gt;printResult(boolean)<br />
#7 /www/vlsiwiki.soe.ucsc.edu/htdocs/includes/api/ApiMain.php(433): ApiMain-&gt;executeAction()<br />
#8 /www/vlsiwiki.soe.ucsc.edu/htdocs/includes/api/ApiMain.php(405): ApiMain-&gt;executeActionWithErrorHandling()<br />
#9 /www/vlsiwiki.soe.ucsc.edu/htdocs/api.php(88): ApiMain-&gt;execute()<br />
#10 {main}<br />