( ! ) Fatal error: Class 't3lib_extMgm' not found in /var/www/typo3/typo3conf/ext/cooluri/ext_tables.php on line 49
Call Stack
#	Time	Memory	Function	Location
1	0.0000	230064	{main}( )	../index.php:0
2	0.0000	230472	call_user_func ( )	../index.php:34
3	0.0001	230528	{closure:/var/www/typo3/typo3_src-7.6.20/index.php:31-34}( )	../index.php:34
4	0.0055	2274040	TYPO3\CMS\Frontend\Http\Application->run( )	../index.php:33
5	0.0062	2399488	TYPO3\CMS\Core\Core\Bootstrap->handleRequest( )	../Application.php:78
6	0.0063	2414528	TYPO3\CMS\Frontend\Http\RequestHandler->handleRequest( )	../Bootstrap.php:302
7	0.0089	2902264	TYPO3\CMS\Core\Core\Bootstrap->loadCachedTca( )	../RequestHandler.php:136
8	0.0089	2902504	TYPO3\CMS\Core\Core\Bootstrap->loadExtensionTables( )	../Bootstrap.php:953
9	0.0117	4801824	TYPO3\CMS\Core\Utility\ExtensionManagementUtility::loadExtTables( )	../Bootstrap.php:974
10	0.0118	4802040	TYPO3\CMS\Core\Utility\ExtensionManagementUtility::loadSingleExtTablesFiles( )	../ExtensionManagementUtility.php:1878
11	0.0127	4927096	require( '/var/www/typo3/typo3conf/ext/cooluri/ext_tables.php' )	../ExtensionManagementUtility.php:1905