When generating reports, you must pay attention to whether all the desired selections were made under the filters:
Subtract breaks - check the box according to whether you want breaks to be calculated in the report or not
Show objects - the report displays objects if they are added to the working time
Compact view - the report does not display the start/end times, but only the working hours
Ignore empty - the report does not display those employees who have not completed/planned any working hours in the given month
All time series - if all workers have not selected an object/type of work/job, then this check box must be ticked - otherwise all the information will not be included in the report. If all employees have made all selections, then this tick is not necessary. Read more HERE.