Exception encountered, of type &quot;Error&quot;<br />
[aOmJmI9Kan6-CEJY9sMO7QAAADE] /en/api.php?action=query&amp;list=filearchive   Error from line 663 of /mnt/ceph/home1/w/e/websupportwiki.com/public/pool/includes/exception/MWExceptionHandler.php: Class 'FormatJson' not found<br />
Backtrace:<br />
#0 /mnt/ceph/home1/w/e/websupportwiki.com/public/pool/includes/exception/MWExceptionHandler.php(242): MWExceptionHandler::logError(ErrorException, string)<br />
#1 /mnt/ceph/home1/w/e/websupportwiki.com/public/pool/includes/AutoLoader.php(81): MWExceptionHandler::handleError(integer, string, string, integer, array)<br />
#2 /mnt/ceph/home1/w/e/websupportwiki.com/public/pool/includes/AutoLoader.php(81): require()<br />
#3 [internal function]: AutoLoader::autoload(string)<br />
#4 /mnt/ceph/home1/w/e/websupportwiki.com/public/pool/includes/api/ApiFormatJson.php(78): spl_autoload_call(string)<br />
#5 /mnt/ceph/home1/w/e/websupportwiki.com/public/pool/includes/api/ApiMain.php(1571): ApiFormatJson-&gt;execute()<br />
#6 /mnt/ceph/home1/w/e/websupportwiki.com/public/pool/includes/api/ApiMain.php(547): ApiMain-&gt;printResult(boolean)<br />
#7 /mnt/ceph/home1/w/e/websupportwiki.com/public/pool/includes/api/ApiMain.php(477): ApiMain-&gt;handleException(UsageException)<br />
#8 /mnt/ceph/home1/w/e/websupportwiki.com/public/pool/includes/api/ApiMain.php(439): ApiMain-&gt;executeActionWithErrorHandling()<br />
#9 /mnt/ceph/home1/w/e/websupportwiki.com/public/pool/api.php(83): ApiMain-&gt;execute()<br />
#10 {main}<br />