BUG: UnrealInsights: Error: Failed to connect to the store client.

General Feedback & Requests
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1

Can’t run profiler using Unreal Insights and UnrealTraceServer, I tried to run manually UnrealTraceServer and it shows:

I:\Epic Games\UE_5.2\Engine\Binaries\Win64>UnrealTraceServer.exe daemon
Setting working directory
Succeeded setting ‘I:\Epic Games\UE_5.2\Engine\Binaries\Win64’ (gle=0)
Creating some shared memory
Creating a quit event
Writing shared instance info
Starting the store

Im able to run manually Unreal Insights Browser but it shows nothing, While I try to run any trace Editor complains about connection:

UnrealInsights: Error: Failed to connect to the store client.

2

Same issue. Unfortunately the only “temporary fix” for me was to restart the PC. When restarting the UnrealTraceServer I got the same issue, so it was useless.

EDIT: As I mentioned on another post (Unreal Insights Does not Connect to Server - #4 by Scienziatogm), maybe I’ve found a fix: disable all the network adapters except the main ethernet/wifi adapter, terminate the UnrealTraceServer.exe process, close the editor and open it again. These steps worked for me without restarting the PC.

3

I’m sending this to those who couldn’t find the answer. (I hope this helps you
in Unreal Engine 5.3, if you get this message you need to open UnrealTraceServer.exe (from the installation folder \UE_5.3\Engine\Binaries\Win64)

if the issue is solved, congratulations. if not you need to open the CMD (if you are using Windows)

run this in the command prompt to stop the current service:
UE_5.3\Engine\Binaries\Win64>UnrealTraceServer.exe kill

and then run this command to start the unreal trace server:
UE_5.3\Engine\Binaries\Win64>UnrealTraceServer.exe fork

note that if you open the UnrealTraceServer.exe without any switches you will see something like this:

UnrealTraceServer v1.17 / Unreal Engine / Epic Games

Usage; <cmd>
Commands;
  fork            Starts a background server, upgrading any existing instance
  daemon    The mode that a background server runs in
  kill              Shuts down a currently running instance

UnrealTraceServer acts as a hub between runtimes that are tracing performance
instrumentation and tools like Unreal Insights that consume and present that
data for analysis. TCP ports 1981 and 1989 are used, where the former receives
trace data, and the latter is used by tools to query the server's store.

Store path; [storage folder for your traces]