Error logging in to my profile

Slim Application Error

The application could not run because of the following error:
Details
*Message:* No parser class available for format: rdfa
*File:* /var/www/auth-rest/lib/EasyRdf/Format.php
*Line:* 402
Trace

#0 /var/www/auth-rest/lib/EasyRdf/Graph.php(235): EasyRdf_Format->newParser()
#1 /var/www/auth-rest/lib/EasyRdf/Graph.php(310):
EasyRdf_Graph->parse('load('http://melvinca...')
#3 /var/www/auth-rest/public/index.php(87): Classes_WebidAuth->processReq()
#4 [internal function]: {closure}()
#5 /var/www/auth-rest/lib/Slim/Route.php(429):
call_user_func_array(Object(Closure), Array)
#6 /var/www/auth-rest/lib/Slim/Slim.php(1147): Slim_Route->dispatch()
#7 /var/www/auth-rest/lib/Slim/Middleware/Flash.php(84): Slim->call()
#8 /var/www/auth-rest/lib/Slim/Middleware/MethodOverride.php(91):
Slim_Middleware_Flash->call()
#9 /var/www/auth-rest/middleware/ContentType.php(64):
Slim_Middleware_MethodOverride->call()
#10 /var/www/auth-rest/lib/Slim/Middleware/PrettyExceptions.php(65):
Middleware_ContentType->call()
#11 /var/www/auth-rest/lib/Slim/Slim.php(1098):
Slim_Middleware_PrettyExceptions->call()
#12 /var/www/auth-rest/public/index.php(213): Slim->run()
#13 {main}

My WebID : http://melvincarvalho.com/#me
Validated XHTML + RDFs :
http://validator.w3.org/check?uri=http%3a%2f%2fmelvincarvalho.com%2f