Prior to the end of the Budget Planning and Setting Salary timeline, the total Distribution Percentage must reach 100%. You may need to manually force the line to 100%.
Example shown here: the Distribution Percentage totals 109.091%, and the total is highlighted in red. It should be changed so that the Total for the Time Band is 100%.
Right-click the Distribution Percentage cell of a chartstring line that should be changed to make the Time Band total 100%.