Exception encountered, of type &quot;Error&quot;<br />
[aHgd8YPJSB4aspUTMhMboQAAAEA] /wiki/api.php?action=query&amp;list=logevents   Error from line 663 of /home/clients/9f22fb278c23e5df9703e8e1f952bf91/web/wiki/includes/exception/MWExceptionHandler.php: Class 'FormatJson' not found<br />
Backtrace:<br />
#0 /home/clients/9f22fb278c23e5df9703e8e1f952bf91/web/wiki/includes/exception/MWExceptionHandler.php(242): MWExceptionHandler::logError(ErrorException, string)<br />
#1 /home/clients/9f22fb278c23e5df9703e8e1f952bf91/web/wiki/includes/AutoLoader.php(81): MWExceptionHandler::handleError(integer, string, string, integer, array)<br />
#2 /home/clients/9f22fb278c23e5df9703e8e1f952bf91/web/wiki/includes/AutoLoader.php(81): require()<br />
#3 [internal function]: AutoLoader::autoload(string)<br />
#4 /home/clients/9f22fb278c23e5df9703e8e1f952bf91/web/wiki/includes/api/ApiFormatJson.php(78): spl_autoload_call(string)<br />
#5 /home/clients/9f22fb278c23e5df9703e8e1f952bf91/web/wiki/includes/api/ApiMain.php(1571): ApiFormatJson-&gt;execute()<br />
#6 /home/clients/9f22fb278c23e5df9703e8e1f952bf91/web/wiki/includes/api/ApiMain.php(1382): ApiMain-&gt;printResult(boolean)<br />
#7 /home/clients/9f22fb278c23e5df9703e8e1f952bf91/web/wiki/includes/api/ApiMain.php(473): ApiMain-&gt;executeAction()<br />
#8 /home/clients/9f22fb278c23e5df9703e8e1f952bf91/web/wiki/includes/api/ApiMain.php(439): ApiMain-&gt;executeActionWithErrorHandling()<br />
#9 /home/clients/9f22fb278c23e5df9703e8e1f952bf91/web/wiki/api.php(83): ApiMain-&gt;execute()<br />
#10 {main}<br />