Compilation error on tutorial 12 (http)

[jesteroftheking]

After these commands :
mkdir build && cd build
cmake ..
executed successfully, i encountered an error for make command (see screenshot below).
In simplx/include/trz/connector/http/server/serverprocess.hpp, replacing #include "trz/util/timer.h" by #include "trz/pattern/timer.h" seems to fix this error.