update 1.7.3 naar 2.5.17 blanco website

Hallo Ik heb via extensiebeheer een update gedaan naar 2.5.17
Nu kan ik wel in de administrator, maar de website is alleen een wit scherm, iemdan een idee?

Ook nog even in de log via directadmin gekeken, zie daar deze meldingen:

Fri Dec 20 00:11:22 2013] [warn] RSA server certificate CommonName (CN) `localhost' does NOT match server name!?
[Fri Dec 20 00:15:06 2013] [warn] RSA server certificate CommonName (CN) `localhost' does NOT match server name!?
[Fri Dec 20 00:15:07 2013] [warn] RSA server certificate CommonName (CN) `localhost' does NOT match server name!?
[Fri Dec 20 00:20:18 2013] [warn] [client 208.115.113.82] mod_fcgid: stderr: PHP Fatal error: Class 'JLoader' not found in /home/vollepolle/domains/vollepolle.nl/public_html/libraries/import.php on line 48
[Fri Dec 20 00:20:48 2013] [warn] [client 208.115.113.82] mod_fcgid: stderr: PHP Fatal error: Class 'JLoader' not found in /home/vollepolle/domains/vollepolle.nl/public_html/libraries/import.php on line 48
[Fri Dec 20 00:23:33 2013] [warn] [client 134.249.55.138] mod_fcgid: stderr: PHP Fatal error: Class 'JLoader' not found in /home/vollepolle/domains/vollepolle.nl/public_html/libraries/import.php on line 48, referer: kinousers.ru/
[Fri Dec 20 00:23:33 2013] [warn] [client 134.249.55.138] mod_fcgid: stderr: PHP Fatal error: Class 'JLoader' not found in /home/vollepolle/domains/vollepolle.nl/public_html/libraries/import.php on line 48, referer: www.tencolors.ru/
[Fri Dec 20 00:23:33 2013] [warn] [client 134.249.55.138] mod_fcgid: stderr: PHP Fatal error: Class 'JLoader' not found in /home/vollepolle/domains/vollepolle.nl/public_html/libraries/import.php on line 48, referer: kinousers.ru/
[Fri Dec 20 00:23:33 2013] [warn] [client 134.249.55.138] mod_fcgid: stderr: PHP Fatal error: Class 'JLoader' not found in /home/vollepolle/domains/vollepolle.nl/public_html/libraries/import.php on line 48, referer: www.tencolors.ru/
[Fri Dec 20 00:23:33 2013] [warn] [client 134.249.55.138] mod_fcgid: stderr: PHP Fatal error: Class 'JLoader' not found in /home/vollepolle/domains/vollepolle.nl/public_html/libraries/import.php on line 48, referer: www.tencolors.ru/
[Fri Dec 20 00:23:34 2013] [warn] [client 134.249.55.138] mod_fcgid: stderr: PHP Fatal error: Class 'JLoader' not found in /home/vollepolle/domains/vollepolle.nl/public_html/libraries/import.php on line 48, referer: kinousers.ru/
[Fri Dec 20 00:28:04 2013] [warn] [client 95.108.158.234] mod_fcgid: stderr: PHP Deprecated: Function eregi() is deprecated in /home/vollepolle/domains/vollepolle.nl/public_html/jGallery/functions.inc.php on line 257

Neem even contact met je hoster op. Vermoed iets met serverconfiguratie.

dacht al zoiets
hou jullie op de hoogte, dank.