The Microsoft Access Database Engine does not recognize

[vanecaro26]

I use Access at work, I'm mostly self-taught and I know very little code . I've built a data base for handling HR KPI´S. In some of my queries, since 2016 started (2015 still runs), several reports I run now pops the error: "The Microsoft Access Database Engine does not recognize 'C_Hrs_Permiso_TI_NT.NOTRAB' as a valid field name or expression". I'm not sure why the report would be giving me an error about it.
Query Code:

TRANSFORM Sum(Hrs_Permiso_TI_NT.MONTOO) AS SumaDeMONTOO SELECT Hrs_Permiso_TI_NT.EMPRESA, Hrs_Permiso_TI_NT.CENCOS, Left([Hrs_Permiso_TI_NT]![AMES],4) AS Año, Right([Hrs_Permiso_TI_NT]![AMES],2) AS Mes, Hrs_Permiso_TI_NT.CODIGO, Fecha_maxmes_Calendario.MáxDeFecha FROM Hrs_Permiso_TI_NT INNER JOIN Fecha_maxmes_Calendario ON Hrs_Permiso_TI_NT.AMES=Fecha_maxmes_Calendario.Ames GROUP BY Hrs_Permiso_TI_NT.EMPRESA, Hrs_Permiso_TI_NT.CENCOS, Left([Hrs_Permiso_TI_NT]![AMES],4), Right([Hrs_Permiso_TI_NT]![AMES],2), Hrs_Permiso_TI_NT.CODIGO, Fecha_maxmes_Calendario.MáxDeFecha PIVOT Hrs_Permiso_TI_NT.COHADE;