Exception encountered, of type &quot;Error&quot;<br />
[6e167373] /wiki/load.php?debug=false&amp;lang=ja&amp;modules=startup&amp;only=scripts&amp;printable=1&amp;skin=vector   Error from line 653 of /var/www/www.docodoco.jp/wiki/includes/exception/MWExceptionHandler.php: Class 'FormatJson' not found<br />
Backtrace:<br />
#0 /var/www/www.docodoco.jp/wiki/includes/exception/MWExceptionHandler.php(241): MWExceptionHandler::logError(ErrorException, string)<br />
#1 /var/www/www.docodoco.jp/wiki/includes/AutoLoader.php(90): MWExceptionHandler::handleError(integer, string, string, integer, array)<br />
#2 /var/www/www.docodoco.jp/wiki/includes/AutoLoader.php(90): require()<br />
#3 [internal function]: AutoLoader::autoload(string)<br />
#4 /var/www/www.docodoco.jp/wiki/includes/resourceloader/ResourceLoader.php(125): spl_autoload_call(string)<br />
#5 /var/www/www.docodoco.jp/wiki/includes/resourceloader/ResourceLoaderStartUpModule.php(406): ResourceLoader-&gt;preloadModuleInfo(array, DerivativeResourceLoaderContext)<br />
#6 /var/www/www.docodoco.jp/wiki/includes/resourceloader/ResourceLoaderStartUpModule.php(388): ResourceLoaderStartUpModule-&gt;getAllModuleHashes(DerivativeResourceLoaderContext)<br />
#7 /var/www/www.docodoco.jp/wiki/includes/resourceloader/ResourceLoaderModule.php(607): ResourceLoaderStartUpModule-&gt;getDefinitionSummary(DerivativeResourceLoaderContext)<br />
#8 /var/www/www.docodoco.jp/wiki/includes/resourceloader/ResourceLoader.php(643): ResourceLoaderModule-&gt;getVersionHash(DerivativeResourceLoaderContext)<br />
#9 [internal function]: ResourceLoader-&gt;{closure}(string)<br />
#10 /var/www/www.docodoco.jp/wiki/includes/resourceloader/ResourceLoader.php(644): array_map(Closure, array)<br />
#11 /var/www/www.docodoco.jp/wiki/includes/resourceloader/ResourceLoader.php(696): ResourceLoader-&gt;getCombinedVersion(ResourceLoaderContext, array)<br />
#12 /var/www/www.docodoco.jp/wiki/load.php(47): ResourceLoader-&gt;respond(ResourceLoaderContext)<br />
#13 {main}<br />