Please ensure you have the file opened in ACROBAT READER DC. Some computers will open the file in a default program such as "Mac Preview" or "Windows Reader". You can download Acrobat Reader DC for free here: get.adobe.com/reader/ NOTE: ADOBE offers you a monthly subscription, BUT you do not have to purchase this program to use it.
If you made any changes to the template while working in the wrong program and saved the file, then you will need to re-download the original file and start your edits over. Editing and saving the file in any program other than Acrobat Reader may cause formatting issues. To be on the safe side, I recommend you re-download the original file before you continue.