eXtplorer - PHP-based File Manager

I use eXtplorer 2.1.9 on J 3.7 and get following errors aftre upgrading to PHP 7:

Deprecated:Methods with the same name as their class will not be constructors in a future version of PHP; ext_Json has a deprecated constructor in /xxxx/public_html/administrator/components/com_extplorer/libraries/JSON.php on line 117
Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Services_JSON_Error has a deprecated constructor in /xxxx/public_html/administrator/components/com_extplorer/libraries/JSON.php on line 840
Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Services_JSON_Error has a deprecated constructor in /xxxx/public_html/administrator/components/com_extplorer/libraries/JSON.php on line 854
Warning: require_once(): open_basedir restriction in effect. File(/usr/local/php70/lib/php/PEAR.php) is not within the allowed path(s): /xxxx/public_html/administrator/components/com_extplorer/libraries/FTP.php on line 25
Warning: require_once(/usr/local/php70/lib/php/PEAR.php): failed to open stream: Operation not permitted in /xxxx/public_html/administrator/components/com_extplorer/libraries/FTP.php on line 25
Fatal error: require_once(): Failed opening required 'PEAR.php' (include_path='.:/usr/local/php70/lib/php:/xxxx/../pear/php') in /xxxx/public_html/administrator/components/com_extplorer/libraries/FTP.php on line 25

folder paths amended for integrity

Is this a problem with extplorer or my webhost?

/Sven