Assertion failed on Anroid Build(ASTC)

UATHelper: Packaging (Android (ASTC)): LogWindows: Error: begin: stack for UAT

UATHelper: Packaging (Android (ASTC)): LogWindows: Error: === Critical error: ===

UATHelper: Packaging (Android (ASTC)): LogWindows: Error: Assertion failed: CharacterCount >= 0 && CharacterCount < ((int32) 0x7fffffff)

[File:C:\UnrealEngine\Engine\Source\Runtime\Core\Public\Containers/UnrealString.h] [Line: 1715]

UATHelper: Packaging (Android (ASTC)): LogWindows: Error: end: stack for UAT

I have seen this log after failed Android build on my project, but half month ago it works fine and I can get .apk files.
Anyone can tell me why this log shows up?