TYPO3 Core

When I download and install a new extension from online repo, the installation process works, but the newly installed extension doesn't appear in the extension manager under "loaded extensions".

The extList entry in the localconf.php is added with the new extension correctly, it looks like this:

$TYPO3_CONF_VARS['EXT']['extList'] = 'css_styled_content,version,tsconfig_help,context_help,extra_page_cm_options, impexp,sys_note,tstemplate,tstemplate_ceditor,tstemplate_info,tstemplate_objbrowser, tstemplate_analyzer,func_wizards,wizard_crpages,wizard_sortpages,lowlevel,install, belog,beuser,aboutmodules,setup,taskcenter,info_pagetsconfig,viewpage,t3skin, t3editor,reports,static_info_tables,fdfx_be_image,ve_guestbook,smilie, ve_guestbook_smilies,captcha,cal,tinymce_rte_patch41,tinymce_languages, tinymce,tinymce_rte,tt_news,naw_securedl,templavoila,maag_randomimage, goof_fotoboek,tt_address,ods_osm,about,cshmanual,feedit,opendocs,simulatestatic, statictemplates,recycler,scheduler,ke_stats,cool_libs2,cool_autoindex,https_enforcer, date2cal'; // Modified or inserted by TYPO3 Extension Manager. Modified or inserted by TYPO3 Core Update Manager. Modified or inserted by TYPO3 Install Tool.

In my case the extension "https_enforcer" has been added and doesn't appear in the extmanager list. Date2cal is listed and the others too, including the extension "cool_autoindex", which I have installed tomorrow morning.

(issue imported from #M15460)