After success in gitlab:

Authorization required

Authorize jenkins to use your account?

You are an admin, which means granting access to jenkins will allow them to interact with GitLab as an admin as well. Proceed with caution.

This application will be able to:

Access your API

it finally fail in jenkins:
org.gitlab.api.GitlabAPIException
at org.gitlab.api.http.GitlabHTTPRequestor.handleAPIError(GitlabHTTPRequestor.java:369)
at org.gitlab.api.http.GitlabHTTPRequestor.to(GitlabHTTPRequestor.java:146)
at org.gitlab.api.http.GitlabHTTPRequestor.to(GitlabHTTPRequestor.java:116)
at org.gitlab.api.GitlabAPI.getUser(GitlabAPI.java:137)
at org.jenkinsci.plugins.GitLabAuthenticationToken.<init>(GitLabAuthenticationToken.java:100)
at org.jenkinsci.plugins.GitLabSecurityRealm.doFinishLogin(GitLabSecurityRealm.java:326)
at sun.reflect.GeneratedMethodAccessor181.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:324)
at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:167)
at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:100)
at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:124)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
at org.kohsuke.stapler.MetaClass$3.doDispatch(MetaClass.java:196)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:649)
at org.kohsuke.stapler.Stapler.service(Stapler.java:238)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:135)
at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:126)

maybe beacuse I use nignx to redirect gitlab?