I updated Bitbucket instance and got the following screen:
HTTP Status 500 – Internal Server Error
Type Exception Report
Message Request processing failed; nested exception is com.google.template.soy.tofu.SoyTofuException: When evaluating "plugin_resource('com.atlassian.bitbucket.server.bitbucket-web:favicon', 'favicon.ico')": While computing function "plugin_resource('com.atlassian.bitbucket.server.bitbucket-web:favicon', 'favicon.ico')": null
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is com.google.template.soy.tofu.SoyTofuException: When evaluating "plugin_resource('com.atlassian.bitbucket.server.bitbucket-web:favicon', 'favicon.ico')": While computing function "plugin_resource('com.atlassian.bitbucket.server.bitbucket-web:favicon', 'favicon.ico')": null
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
com.atlassian.johnson.spring.lifecycle.LifecycleDispatcherServlet.service(LifecycleDispatcherServlet.java:131)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
com.atlassian.stash.internal.web.filters.StandardResponseHeadersFilter.doFilterInternal(StandardResponseHeadersFilter.java:102)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:347)
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:263)
com.atlassian.johnson.spring.web.filter.BypassableDelegatingFilterProxy.doFilter(BypassableDelegatingFilterProxy.java:51)
com.atlassian.johnson.spring.lifecycle.LifecycleDelegatingFilterProxy.doFilter(LifecycleDelegatingFilterProxy.java:38)
com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:39)
com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:58)
com.atlassian.applinks.core.rest.context.ContextFilter.doFilter(ContextFilter.java:24)
com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:64)