strip.css.sass.enabled を portal-ext.propertiesの true に設定した場合、 MalformedURLException がスローされることになります：
ERROR [http-bio-8080-exec-1][VirtualHostFilter:323] java.net.MalformedURLException: Path null does not start with a "/" character java.net.MalformedURLException: Path null does not start with a "/" character at org.apache.catalina.core.ApplicationContext.getResource(ApplicationContext.java:524) at org.apache.catalina.core.ApplicationContextFacade.getResource(ApplicationContextFacade.java:201) at com.liferay.portal.servlet.filters.dynamiccss.DynamicCSSUtil.parseSass(DynamicCSSUtil.java:124) at com.liferay.portal.servlet.filters.strip.StripFilter.processCSS(StripFilter.java:297) at com.liferay.portal.servlet.filters.strip.StripFilter.strip(StripFilter.java:677) at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:397) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169) at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:123) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169) at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:293) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169) at com.liferay.portal.servlet.filters.i18n.I18nFilter.processFilter(I18nFilter.java:243) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169) at com.liferay.portal.servlet.filters.cache.CacheFilter.processFilter(CacheFilter.java:408) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169) at com.liferay.portal.servlet.filters.etag.ETagFilter.processFilter(ETagFilter.java:70) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169) at com.liferay.portal.servlet.filters.jsoncontenttype.JSONContentTypeFilter.processFilter(JSONContentTypeFilter.java:42) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169) at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:263) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339) at com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.processFilter(VirtualHostFilter.java:320) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:185) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96) at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:165) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:165) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:185) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96) at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:724)
解像度
この問題は、修正パックPortal-69-6210で解決されます。
追加情報
LPS-42475 を参照し、解決してください。