Xibo is not displaying a webPage

I'm running python Client on Ubuntu12.04 a
When I run the python script appears the following log in terminal

Xibo Client v1.6.0-rc2
Reading default configuration
Reading user configuration
LOG: 1416508138.69 2 info XiboLogScreen logger started at level 10
LOG: 1416508138.69 2 info Not setting socket timeout
Log Level is: 10
Logging will be handled by: XiboLogFile
Switching to new logger
[3300:3307:1858641915:ERROR:process_singleton_linux.cc(264)] Failed to create /opt/admin/pyclient/client/python/.berkelium/SingletonLock: File exists
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
[14-11-20 12:29:02.426][.ERR][.....NONE] : Failed to open file '/opt/admin/pyclient/client/python/resources/logo.png': No such file or directory
[3300:3694:3031075473:ERROR:x509_certificate_nss.cc(780)] CERT_PKIXVerifyCert for www.google.com failed err=-8181
[3300:3696:3031291004:ERROR:zygote_main_linux.cc(547)] Your system is broken: dlsym doesn't work! This has been reported to be caused by Nvidia's libGL. You should expect time related functions to misbehave. http://code.google.com/p/chromium/issues/detail?id=16800
[3300:3697:3036784442:ERROR:x509_certificate_nss.cc(780)] CERT_PKIXVerifyCert for dl.google.com failed err=-8181
[3300:18207:375810989467:ERROR:x509_certificate_nss.cc(780)] CERT_PKIXVerifyCert for clients2.google.com failed err=-8181
[3300:16910:393323082614:ERROR:x509_certificate_nss.cc(780)] CERT_PKIXVerifyCert for clients2.google.com failed err=-8181
[3300:18207:409686912708:ERROR:x509_certificate_nss.cc(780)] CERT_PKIXVerifyCert for clients2.google.com failed err=-8181
[3300:18207:427079246931:ERROR:x509_certificate_nss.cc(780)] CERT_PKIXVerifyCert for clients2.google.com failed err=-8181
[3300:18207:443703932492:ERROR:x509_certificate_nss.cc(780)] CERT_PKIXVerifyCert for clients2.google.com failed err=-8181
[3300:18207:460434607536:ERROR:x509_certificate_nss.cc(780)] CERT_PKIXVerifyCert for clients2.google.com failed err=-8181
[3300:22687:476772801485:ERROR:x509_certificate_nss.cc(780)] CERT_PKIXVerifyCert for clients2.google.com failed err=-8181
[3300:22687:493293090940:ERROR:x509_certificate_nss.cc(780)] CERT_PKIXVerifyCert for clients2.google.com failed err=-8181
[3300:18207:512075049631:ERROR:x509_certificate_nss.cc(780)] CERT_PKIXVerifyCert for clients2.google.com failed err=-8181

Any ideas why this is happening??