Warning: require_once(PEAR/ErrorStack.php): failed to open stream: No such file or directory in C:\SistemasPHP\observatorio4\vendor\pear\archive_tar\tests\phpt_test.php.inc on line 5

Fatal error: require_once(): Failed opening required 'PEAR/ErrorStack.php' (include_path='.;C:\php\pear') in C:\SistemasPHP\observatorio4\vendor\pear\archive_tar\tests\phpt_test.php.inc on line 5