Error when Upgrading 2.46.0 > 2.52.0 (2.51.0 also testet)

Hello,
i get following error after Update when i open the Main Web Page.

2023-04-22 09:37:59,811+0200 ERROR [qtp1442426568-94] *SYSTEM org.sonatype.nexus.internal.web.ErrorPageServlet - Unexpected exception
java.lang.AbstractMethodError: null
at org.sonatype.nexus.security.internal.DefaultSecuritySystem.findUser(DefaultSecuritySystem.java:342)
at org.sonatype.nexus.security.internal.DefaultSecuritySystem.getUser(DefaultSecuritySystem.java:371)
at org.sonatype.nexus.security.internal.DefaultSecuritySystem.currentUser(DefaultSecuritySystem.java:362)
at org.sonatype.nexus.internal.selector.SelectorManagerImpl.browseActive(SelectorManagerImpl.java:273)
at org.sonatype.nexus.common.stateguard.MethodInvocationAction.run(MethodInvocationAction.java:39)
at org.sonatype.nexus.common.stateguard.StateGuard$GuardImpl.run(StateGuard.java:272)
at org.sonatype.nexus.common.stateguard.GuardedInterceptor.invoke(GuardedInterceptor.java:54)
at org.sonatype.nexus.repository.security.RepositoryPermissionChecker.subjectHasAnyContentSelectorAccessTo(RepositoryPermissionChecker.java:263)
at org.sonatype.nexus.repository.security.RepositoryPermissionChecker.userCanBrowseRepositories(RepositoryPermissionChecker.java:122)
at org.sonatype.nexus.repository.security.RepositoryPermissionChecker.userCanBrowseRepositories(RepositoryPermissionChecker.java:178)
at org.sonatype.nexus.coreui.service.RepositoryUiService.getBrowseableFormats(RepositoryUiService.java:157)
at org.sonatype.nexus.coreui.service.RepositoryUiService.getState(RepositoryUiService.java:174)
at org.sonatype.nexus.rapture.internal.state.StateComponent.getState(StateComponent.java:87)
at com.palominolabs.metrics.guice.ExceptionMeteredInterceptor.invoke(ExceptionMeteredInterceptor.java:23)
at com.palominolabs.metrics.guice.TimedInterceptor.invoke(TimedInterceptor.java:26)
at org.sonatype.nexus.rapture.internal.RaptureWebResourceBundle.getState(RaptureWebResourceBundle.java:313)
at org.sonatype.nexus.rapture.internal.RaptureWebResourceBundle.access$4(RaptureWebResourceBundle.java:312)
at org.sonatype.nexus.rapture.internal.RaptureWebResourceBundle$4.generate(RaptureWebResourceBundle.java:270)
at org.sonatype.nexus.webresources.GeneratedWebResource$1.(GeneratedWebResource.java:63)
at org.sonatype.nexus.webresources.GeneratedWebResource.prepare(GeneratedWebResource.java:58)
at org.sonatype.nexus.internal.webresources.WebResourceServlet.serveResource(WebResourceServlet.java:128)
at org.sonatype.nexus.internal.webresources.WebResourceServlet.doGet(WebResourceServlet.java:112)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at com.google.inject.servlet.ServletDefinition.doServiceImpl(ServletDefinition.java:290)
at com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:280)
at com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:184)
at com.google.inject.servlet.DynamicServletPipeline.service(DynamicServletPipeline.java:71)
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61)
at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108)
at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137)
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:154)
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66)
at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108)
at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137)
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:154)
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66)
at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:458)
at org.sonatype.nexus.security.SecurityFilter.executeChain(SecurityFilter.java:96)
at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:373)
at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:387)
at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:370)
at org.sonatype.nexus.security.SecurityFilter.doFilterInternal(SecurityFilter.java:112)
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:154)
at com.codahale.metrics.servlet.AbstractInstrumentedFilter.doFilter(AbstractInstrumentedFilter.java:112)
at com.sonatype.nexus.licensing.internal.LicensingRedirectFilter.doFilter(LicensingRedirectFilter.java:116)
at com.codahale.metrics.servlet.AbstractInstrumentedFilter.doFilter(AbstractInstrumentedFilter.java:112)
at org.sonatype.nexus.internal.web.ErrorPageFilter.doFilter(ErrorPageFilter.java:79)
at org.sonatype.nexus.internal.web.EnvironmentFilter.doFilter(EnvironmentFilter.java:101)
at org.sonatype.nexus.internal.web.HeaderPatternFilter.doFilter(HeaderPatternFilter.java:98)
at com.google.inject.servlet.DynamicFilterPipeline.dispatch(DynamicFilterPipeline.java:104)
at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:133)
at org.sonatype.nexus.bootstrap.osgi.DelegatingFilter.doFilter(DelegatingFilter.java:73)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:201)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:552)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:600)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1440)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:505)

Its happened, when i try to Open the Main Web Page.