Seems like I didn’t open the Access to install it, but how?
Access denied when checking [programming] access to [Wiki littlelab] for user [xwiki:XWiki.TNTErick]
class org.xwiki.extension.InstallException: Failed to resolve extension
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension(AbstractInstallPlanJob.java:776)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension(AbstractInstallPlanJob.java:309)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension(AbstractInstallPlanJob.java:277)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.start(AbstractInstallPlanJob.java:208)
at org.xwiki.extension.job.internal.InstallPlanJob.runInternal(InstallPlanJob.java:88)
at org.xwiki.job.AbstractJob.runInContext(AbstractJob.java:236)
at org.xwiki.job.AbstractJob.run(AbstractJob.java:213)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: class org.xwiki.extension.InstallException: Install of extension [org.xwiki.contrib.mediawiki:mediawiki-xml/1.12.1] is not allowed
at org.xwiki.extension.internal.validator.AbstractExtensionValidator.checkInstallInternal(AbstractExtensionValidator.java:162)
at org.xwiki.extension.internal.validator.XWikiExtensionValidator.checkInstallInternal(XWikiExtensionValidator.java:80)
at org.xwiki.extension.internal.validator.AbstractExtensionValidator.checkInstall(AbstractExtensionValidator.java:111)
at org.xwiki.extension.handler.internal.AbstractExtensionHandler.checkInstall(AbstractExtensionHandler.java:101)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.checkTypeInstall(AbstractInstallPlanJob.java:850)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension(AbstractInstallPlanJob.java:927)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension(AbstractInstallPlanJob.java:773)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension(AbstractInstallPlanJob.java:309)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension(AbstractInstallPlanJob.java:277)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.start(AbstractInstallPlanJob.java:208)
at org.xwiki.extension.job.internal.InstallPlanJob.runInternal(InstallPlanJob.java:88)
at org.xwiki.job.AbstractJob.runInContext(AbstractJob.java:236)
at org.xwiki.job.AbstractJob.run(AbstractJob.java:213)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: class org.xwiki.security.authorization.AccessDeniedException: Access denied when checking [programming] access to [Wiki littlelab] for user [xwiki:XWiki.TNTErick]
at org.xwiki.security.authorization.DefaultAuthorizationManager.checkAccess(DefaultAuthorizationManager.java:94)
at org.xwiki.extension.internal.validator.AbstractExtensionValidator.checkAccess(AbstractExtensionValidator.java:103)
at org.xwiki.extension.internal.validator.AbstractExtensionValidator.checkAccess(AbstractExtensionValidator.java:96)
at org.xwiki.extension.internal.validator.AbstractExtensionValidator.checkAccess(AbstractExtensionValidator.java:147)
at org.xwiki.extension.internal.validator.AbstractExtensionValidator.checkAccess(AbstractExtensionValidator.java:118)
at org.xwiki.extension.internal.validator.AbstractExtensionValidator.checkInstallInternal(AbstractExtensionValidator.java:160)
at org.xwiki.extension.internal.validator.XWikiExtensionValidator.checkInstallInternal(XWikiExtensionValidator.java:80)
at org.xwiki.extension.internal.validator.AbstractExtensionValidator.checkInstall(AbstractExtensionValidator.java:111)
at org.xwiki.extension.handler.internal.AbstractExtensionHandler.checkInstall(AbstractExtensionHandler.java:101)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.checkTypeInstall(AbstractInstallPlanJob.java:850)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension(AbstractInstallPlanJob.java:927)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension(AbstractInstallPlanJob.java:773)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension(AbstractInstallPlanJob.java:309)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension(AbstractInstallPlanJob.java:277)
at org.xwiki.extension.job.internal.AbstractInstallPlanJob.start(AbstractInstallPlanJob.java:208)
at org.xwiki.extension.job.internal.InstallPlanJob.runInternal(InstallPlanJob.java:88)
at org.xwiki.job.AbstractJob.runInContext(AbstractJob.java:236)
at org.xwiki.job.AbstractJob.run(AbstractJob.java:213)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)