After a couple of days, our server started crashing regularly.
Let me clarify right away that the server database was about a couple of weeks old. The server upgraded from UE4 to UE5 without errors, but now problems have started.
The key strings during crashes are always like this.
[2026.05.06-21.35.59:955][ 0]NPC: Error: Data: No stat templates found for Stat template 0.
[2026.05.06-21.35.59:955][ 0]NPC: Error: Data: No stat templates found for StatModifier template None.
[2026.05.06-21.35.59:958][ 0]LogWindows: Error: appError called: Fatal error: [File:C:\b\exiles\Engine\Source\Runtime\Core\Private\Containers\ContainerHelpers.cpp] [Line: 8]
Trying to resize TArray to an invalid size of 3137260047
[2026.05.06-21.35.59:958][ 0]LogWindows: Error: Windows GetLastError: Системе не удается найти указанный параметр среды. (203)
[2026.05.06-21.35.59:966][ 0]LogWindows: Error: === Critical error: ===
[2026.05.06-21.35.59:966][ 0]LogWindows: Error:
[2026.05.06-21.35.59:966][ 0]LogWindows: Error: Fatal error: [File:C:\b\exiles\Engine\Source\Runtime\Core\Private\Containers\ContainerHelpers.cpp] [Line: 8]
[2026.05.06-21.35.59:966][ 0]LogWindows: Error: Trying to resize TArray to an invalid size of 3137260047
[2026.05.06-21.35.59:966][ 0]LogWindows: Error:
[2026.05.06-21.35.59:966][ 0]LogWindows: Error:
Here are some recent logs as an example. logs