Issue with counter. Can not build simulation.

Run Simulator
 Generate
 Done
 Generate Assets
 make -f simulator/gcc/Makefile assets -j10
 Converting images
 Done
 Post Generate
 touchgfx update_project --project-file=../EWARM/STM32F7508_DISCO.ewp --gui-group-name=Application/User/TouchGFX/gui --generated-group-name=Application/User/TouchGFX/generated && touchgfx update_project --project-file=simulator/msvs/Application.vcxproj
 Done
 Compile
 make -f simulator/gcc/Makefile -j10
 Converting images
 Compiling gui/src/pressurescreen_screen/PressureScreenView.cpp
 gui/src/pressurescreen_screen/PressureScreenView.cpp: In member function 'virtual void PressureScreenView::UpButtonClicked()':
 gui/src/pressurescreen_screen/PressureScreenView.cpp:27:23: error: 'textCounterBuffer' was not declared in this scope
 Unicode::snprintf(textCounterBuffer, TEXTCOUNTER_SIZE, "%d", counter);
 ^~~~~~~~~~~~~~~~~
 gui/src/pressurescreen_screen/PressureScreenView.cpp:27:23: note: suggested alternative: 'IRpcChannelBuffer'
 Unicode::snprintf(textCounterBuffer, TEXTCOUNTER_SIZE, "%d", counter);
 ^~~~~~~~~~~~~~~~~
 IRpcChannelBuffer
 gui/src/pressurescreen_screen/PressureScreenView.cpp:27:42: error: 'TEXTCOUNTER_SIZE' was not declared in this scope
 Unicode::snprintf(textCounterBuffer, TEXTCOUNTER_SIZE, "%d", counter);
 ^~~~~~~~~~~~~~~~
 gui/src/pressurescreen_screen/PressureScreenView.cpp:27:42: note: suggested alternative: 'PERF_COUNTER_TIMER'
 Unicode::snprintf(textCounterBuffer, TEXTCOUNTER_SIZE, "%d", counter);
 ^~~~~~~~~~~~~~~~
 PERF_COUNTER_TIMER
 gui/src/pressurescreen_screen/PressureScreenView.cpp:29:5: error: 'textCounter' was not declared in this scope
 textCounter.invalidate();
 ^~~~~~~~~~~
 gui/src/pressurescreen_screen/PressureScreenView.cpp:29:5: note: suggested alternative: 'PMCCounter'
 textCounter.invalidate();
 ^~~~~~~~~~~
 PMCCounter
 gui/src/pressurescreen_screen/PressureScreenView.cpp: In member function 'virtual void PressureScreenView::DownButtonClicked()':
 gui/src/pressurescreen_screen/PressureScreenView.cpp:40:23: error: 'textCounterBuffer' was not declared in this scope
 Unicode::snprintf(textCounterBuffer, TEXTCOUNTER_SIZE, "%d", counter);
 ^~~~~~~~~~~~~~~~~
 gui/src/pressurescreen_screen/PressureScreenView.cpp:40:23: note: suggested alternative: 'IRpcChannelBuffer'
 Unicode::snprintf(textCounterBuffer, TEXTCOUNTER_SIZE, "%d", counter);
 ^~~~~~~~~~~~~~~~~
 IRpcChannelBuffer
 gui/src/pressurescreen_screen/PressureScreenView.cpp:40:42: error: 'TEXTCOUNTER_SIZE' was not declared in this scope
 Unicode::snprintf(textCounterBuffer, TEXTCOUNTER_SIZE, "%d", counter);
 ^~~~~~~~~~~~~~~~
 gui/src/pressurescreen_screen/PressureScreenView.cpp:40:42: note: suggested alternative: 'PERF_COUNTER_TIMER'
 Unicode::snprintf(textCounterBuffer, TEXTCOUNTER_SIZE, "%d", counter);
 ^~~~~~~~~~~~~~~~
 PERF_COUNTER_TIMER
 gui/src/pressurescreen_screen/PressureScreenView.cpp:42:5: error: 'textCounter' was not declared in this scope
 textCounter.invalidate();
 ^~~~~~~~~~~
 gui/src/pressurescreen_screen/PressureScreenView.cpp:42:5: note: suggested alternative: 'PMCCounter'
 textCounter.invalidate();
 ^~~~~~~~~~~
 PMCCounter
 simulator/gcc/Makefile:220: recipe for target 'build/MINGW32_NT-6.2/gui/src/pressurescreen_screen/PressureScreenView.o' failed
 make[2]: *** [build/MINGW32_NT-6.2/gui/src/pressurescreen_screen/PressureScreenView.o] Error 1
 make[1]: *** [generate_assets] Error 2
 simulator/gcc/Makefile:182: recipe for target 'generate_assets' failed
 simulator/gcc/Makefile:40: recipe for target 'all' failed
 make: *** [all] Error 2
 Failed
 Failed

This is my error message and below is the lines where it is causing the error. I know I have to declare these variables somewhere but in the tutorial it never had me declare these Unicode things. I am unfamiliar with this.

Thank you

void PressureScreenView::UpButtonClicked()
{
 touchgfx_printf("UpButtonClicked\n");
 
 //if (pressureVal < 43)
 {
 counter = counter + 1;
 }
 touchgfx_printf("%d\n", counter);
 Unicode::snprintf(textCounterBuffer, TEXTCOUNTER_SIZE, "%d", counter);
 //Invalidate text area
 textCounter.invalidate();
}
void PressureScreenView::DownButtonClicked()
{
 touchgfx_printf("DownButtonClicked\n");
 
 //if (pressureVal > 21)
 {
 counter = counter - 1;
 }
 touchgfx_printf("%d", counter);
 Unicode::snprintf(textCounterBuffer, TEXTCOUNTER_SIZE, "%d", counter);
 //Invalidate text area
 textCounter.invalidate();
}