Cannot Update to current software therefore I cannot download Pages
I have an older MAC and currently have Sierra as operating system. My MAC was cleared out and I do not have my apps, most importantly Pages. I cannot download Pages as I need the updated software but I cannot download it and gives me this:
This version of macOS 10.15.6 cannot be installed on this computer.
I looked on Apple Support downloads to download the prior versions of Pages but I am unable to as it says it cannot be installed on this disk and an eligble Pages application was not found in this location.
Please help. I am certain I am not alone with this issue.