MediaWiki internal error.<br />
<br />
Original exception: exception 'MWException' with message 'Detected bug in an extension! Hook skinCategoriaRebost failed to return a value; should return true to continue hook processing or false to abort.' in /home/sites/org.softcatala/web/w/includes/Hooks.php:133<br />
Stack trace:<br />
#0 /home/sites/org.softcatala/web/w/includes/SkinTemplate.php(144): wfRunHooks('BeforePageDispl...', Array)<br />
#1 /home/sites/org.softcatala/web/w/includes/OutputPage.php(696): SkinTemplate-&gt;outputPage(Object(OutputPage))<br />
#2 /home/sites/org.softcatala/web/w/includes/Wiki.php(301): OutputPage-&gt;output()<br />
#3 /home/sites/org.softcatala/web/w/index.php(90): MediaWiki-&gt;finalCleanup(Array, Object(LoadBalancer), Object(OutputPage))<br />
#4 {main}<br />
<br />
Exception caught inside exception handler: exception 'MWException' with message 'Detected bug in an extension! Hook skinCategoriaRebost failed to return a value; should return true to continue hook processing or false to abort.' in /home/sites/org.softcatala/web/w/includes/Hooks.php:133<br />
Stack trace:<br />
#0 /home/sites/org.softcatala/web/w/includes/SkinTemplate.php(144): wfRunHooks('BeforePageDispl...', Array)<br />
#1 /home/sites/org.softcatala/web/w/includes/OutputPage.php(696): SkinTemplate-&gt;outputPage(Object(OutputPage))<br />
#2 /home/sites/org.softcatala/web/w/includes/Exception.php(86): OutputPage-&gt;output()<br />
#3 /home/sites/org.softcatala/web/w/includes/Exception.php(111): MWException-&gt;reportHTML()<br />
#4 /home/sites/org.softcatala/web/w/includes/Exception.php(191): MWException-&gt;report()<br />
#5 /home/sites/org.softcatala/web/w/includes/Exception.php(225): wfReportException(Object(MWException))<br />
#6 [internal function]: wfExceptionHandler(Object(MWException))<br />
#7 {main}<br />