I have this error, any clue what might be causing it?


39051 [INFO] --- maven-antrun-plugin:3.0.0:run (system-test-compile) @ c-system-test ---
39074 [INFO] Executing tasks
39795 [INFO]      [exec] Microsoft (R) Build Engine version 16.11.2+f32259642 for .NET Framework
39795 [INFO]      [exec] Copyright (C) Microsoft Corporation. All rights reserved.
39795 [INFO]      [exec] 
42316 [INFO]      [exec]   test-connect.c
42426 [INFO]      [exec] ..\c\test-connect.c(15): fatal error C1083: Cannot open include file: 'apr.h': No such file or directory [C:\builds\engineering\diffusion\c\system-test\src\main\projects\test-connect.vcxproj]
42631 [INFO]      [exec]   test-credentials.c The letter j should appear at least 34 times.
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