The most likely cause will be the incorrect settings for the spread of cells in your spreadsheet.
To check the number of Rows & Columns in your template:
Go to Set Up > Preference Settings > System Preferences (top menu of your software).
Find the Excel processing limits:
Excel – Columns to Process
Excel – Rows to Process
Check to see that your template’s required rows and columns don’t exceed the numbers set here.
If they do, then you will need to change the numbers in this box so the processed range covers the full size of your template (where indicated below in your settings).
