code manager error

{
    "details": {
        "message": "throw+: {:kind :puppetlabs.code-manager/shell-failed, :result {:exit-code 1, :stderr \"\u001b[31m\\nError while running: #<R10K::Error: Unable to determine current branches for Git source 'puppet' (/etc/puppetlabs/code-staging/environments)>\u001b[0m\\n\", :stdout \"\"}}",
        "trace": [
            "puppetlabs.code_manager.core$collect_environments.invoke (core.clj:46)",
            "puppetlabs.code_manager.shell_workers$build_collect_all_fn$collect_all__19045.invoke (shell_workers.clj:70)",
            "puppetlabs.code_manager.app$build_deploy_handler$deploy_handler__18554.invoke (app.clj:76)",
            "puppetlabs.code_manager.app$wrap_format_errors$format_errors__18564.invoke (app.clj:119)",
            "ring.middleware.json$wrap_json_response$fn__14057.invoke (json.clj:65)",
            "ring.middleware.json$wrap_json_body$fn__14040.invoke (json.clj:33)",
            "ring.middleware.keyword_params$wrap_keyword_params$fn__14018.invoke (keyword_params.clj:35)",
            "puppetlabs.rbac.http.middleware.authentication$wrap_block_anonymous_access$fn__18528.invoke (authentication.clj:167)",
            "puppetlabs.rbac.http.middleware.authentication$wrap_token_access_STAR_$fn__18511.invoke (authentication.clj:94)",
            "ring.middleware.params$wrap_params$fn__6076.invoke (params.clj:64)",
            "compojure.response$eval9960$fn__9961.invoke (response.clj:34)",
            "compojure.response$eval9919$fn__9920$G__9910__9927.invoke (response.clj:7)",
            "puppetlabs.code_manager.app$build_routes$fn__18594.invoke (app.clj:182)",
            "bidi.ring$eval9747$fn__9748.invoke (ring.clj:22)",
            "bidi.ring$eval9726$fn__9727$G__9717__9736.invoke (ring.clj:13)",
            "puppetlabs.comidi$make_handler$fn__11548.invoke (comidi.clj:267)",
            "puppetlabs.trapperkeeper.services.webserver.jetty9_core$ring_handler$fn__26568.invoke (jetty9_core.clj:408)",
            "puppetlabs.trapperkeeper.services.webserver.jetty9_core.proxy$org.eclipse.jetty.server.handler.AbstractHandler$ff19274a.handle (:-1)",
            "org.eclipse.jetty.server.handler.ContextHandler.doHandle (ContextHandler.java:1129)",
            "org.eclipse.jetty.server.handler.ContextHandler.doScope (ContextHandler.java:1065)",
            "org.eclipse.jetty.server.handler.ScopedHandler.handle (ScopedHandler.java:141)",
            "org.eclipse.jetty.server.handler.ContextHandlerCollection.handle (ContextHandlerCollection.java:215)",
            "org.eclipse.jetty.server.handler.HandlerCollection.handle (HandlerCollection.java:110)",
            "org.eclipse.jetty.server.handler.HandlerWrapper.handle (HandlerWrapper.java:97)",
            "org.eclipse.jetty.server.handler.RequestLogHandler.handle (RequestLogHandler.java:95)",
            "org.eclipse.jetty.server.handler.HandlerWrapper.handle (HandlerWrapper.java:97)",
            "org.eclipse.jetty.server.handler.StatisticsHandler.handle (StatisticsHandler.java:159)",
            "org.eclipse.jetty.server.handler.HandlerWrapper.handle (HandlerWrapper.java:97)",
            "org.eclipse.jetty.server.Server.handle (Server.java:497)",
            "org.eclipse.jetty.server.HttpChannel.handle (HttpChannel.java:310)",
            "org.eclipse.jetty.server.HttpConnection.onFillable (HttpConnection.java:257)",
            "org.eclipse.jetty.io.AbstractConnection$2.run (AbstractConnection.java:540)",
            "org.eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:635)",
            "org.eclipse.jetty.util.thread.QueuedThreadPool$3.run (QueuedThreadPool.java:555)",
            "java.lang.Thread.run (Thread.java:745)"
        ]
    },
    "kind": "internal-server-error",
    "msg": "An error occured while attempting to process your request"
}