Ya he encontrado el Log, te adjunto el error por si me puedes ayudar:
15:38:35,872 ERROR [AutoLoginFilter:246] Current URL /web/guest/home?p_auth=IR45
w7EL&p_p_id=58&p_p_lifecycle=1&p_p_state=maximized&p_p_mode=view&p_p_col_id=colu
mn-2&p_p_col_pos=4&p_p_col_count=5&saveLastPath=0&_58_struts_action=%2Flogin%2Fc
reate_account generates exception: null
15:38:35,874 ERROR [AutoLoginFilter:246] Current URL /web/guest/home?p_auth=IR45
w7EL&p_p_id=58&p_p_lifecycle=1&p_p_state=maximized&p_p_mode=view&p_p_col_id=colu
mn-2&p_p_col_pos=4&p_p_col_count=5&saveLastPath=0&_58_struts_action=%2Flogin%2Fc
reate_account generates exception: null
15:38:35,881 ERROR [AutoLoginFilter:246] Current URL /web/guest/home?p_auth=IR45
w7EL&p_p_id=58&p_p_lifecycle=1&p_p_state=maximized&p_p_mode=view&p_p_col_id=colu
mn-2&p_p_col_pos=4&p_p_col_count=5&saveLastPath=0&_58_struts_action=%2Flogin%2Fc
reate_account generates exception: null
15:38:35,882 ERROR [AutoLoginFilter:246] Current URL /web/guest/home?p_auth=IR45
w7EL&p_p_id=58&p_p_lifecycle=1&p_p_state=maximized&p_p_mode=view&p_p_col_id=colu
mn-2&p_p_col_pos=4&p_p_col_count=5&saveLastPath=0&_58_struts_action=%2Flogin%2Fc
reate_account generates exception: null
15:38:36,092 INFO [CaptchaImpl:127] Initializing com.liferay.portal.captcha.sim
plecaptcha.SimpleCaptchaImpl
15:38:36,370 ERROR [AutoLoginFilter:246] Current URL /web/guest/home?p_auth=IR45
w7EL&p_p_id=58&p_p_lifecycle=1&p_p_state=exclusive&p_p_mode=view&_58_struts_acti
on=%2Flogin%2Fcaptcha generates exception: null
15:38:36,372 ERROR [AutoLoginFilter:246] Current URL /web/guest/home?p_auth=IR45
w7EL&p_p_id=58&p_p_lifecycle=1&p_p_state=exclusive&p_p_mode=view&_58_struts_acti
on=%2Flogin%2Fcaptcha generates exception: null
15:38:36,376 ERROR [AutoLoginFilter:246] Current URL /web/guest/home?p_auth=IR45
w7EL&p_p_id=58&p_p_lifecycle=1&p_p_state=exclusive&p_p_mode=view&_58_struts_acti
on=%2Flogin%2Fcaptcha generates exception: null
15:38:36,378 ERROR [AutoLoginFilter:246] Current URL /web/guest/home?p_auth=IR45
w7EL&p_p_id=58&p_p_lifecycle=1&p_p_state=exclusive&p_p_mode=view&_58_struts_acti
on=%2Flogin%2Fcaptcha generates exception: null
15:39:15,900 ERROR [AutoLoginFilter:246] Current URL /web/guest/home?p_auth=IR45
w7EL&p_p_id=58&p_p_lifecycle=1&p_p_state=maximized&p_p_mode=view&saveLastPath=0&
_58_struts_action=%2Flogin%2Fcreate_account generates exception: null
15:39:15,903 ERROR [AutoLoginFilter:246] Current URL /web/guest/home?p_auth=IR45
w7EL&p_p_id=58&p_p_lifecycle=1&p_p_state=maximized&p_p_mode=view&saveLastPath=0&
_58_struts_action=%2Flogin%2Fcreate_account generates exception: null
15:39:15,909 ERROR [AutoLoginFilter:246] Current URL /web/guest/home?p_auth=IR45
w7EL&p_p_id=58&p_p_lifecycle=1&p_p_state=maximized&p_p_mode=view&saveLastPath=0&
_58_struts_action=%2Flogin%2Fcreate_account generates exception: null
15:39:15,911 ERROR [AutoLoginFilter:246] Current URL /web/guest/home?p_auth=IR45
w7EL&p_p_id=58&p_p_lifecycle=1&p_p_state=maximized&p_p_mode=view&saveLastPath=0&
_58_struts_action=%2Flogin%2Fcreate_account generates exception: null
15:39:16,039 ERROR [jsp:154] java.lang.NullPointerException
at com.liferay.portal.security.pwd.PasswordPolicyToolkit.generateDynamic
(PasswordPolicyToolkit.java:162)
at com.liferay.portal.security.pwd.PasswordPolicyToolkit.generate(Passwo
rdPolicyToolkit.java:75)
at com.liferay.portal.security.pwd.PwdToolkitUtil._generate(PwdToolkitUt
il.java:56)
at com.liferay.portal.security.pwd.PwdToolkitUtil.generate(PwdToolkitUti
l.java:32)
at com.liferay.portal.service.impl.UserLocalServiceImpl.addUser(UserLoca
lServiceImpl.java:354)
at com.liferay.portal.dao.jdbc.aop.DynamicDataSourceTransactionIntercept
or.invoke(DynamicDataSourceTransactionInterceptor.java:44)
at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableM
ethodAdvice.java:58)
at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableM
ethodAdvice.java:58)
at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableM
ethodAdvice.java:58)
at com.liferay.portal.service.impl.UserServiceImpl.addUser(UserServiceIm
pl.java:193)
at com.liferay.portal.dao.jdbc.aop.DynamicDataSourceTransactionIntercept
or.invoke(DynamicDataSourceTransactionInterceptor.java:44)
at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableM
ethodAdvice.java:58)
at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableM
ethodAdvice.java:58)
at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableM
ethodAdvice.java:58)
at com.liferay.portal.service.UserServiceUtil.addUser(UserServiceUtil.ja
va:88)
at com.liferay.portlet.login.action.CreateAccountAction.addUser(CreateAc
countAction.java:243)
at com.liferay.portlet.login.action.CreateAccountAction.processAction(Cr
eateAccountAction.java:98)
at com.liferay.portal.struts.PortletRequestProcessor.process(PortletRequ
estProcessor.java:169)
at com.liferay.portlet.StrutsPortlet.processAction(StrutsPortlet.java:18
6)
at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:70)
Be kell jelentkezni ahhoz, hogy ez helytelenként legyen megjelölve.