MacOS Catalina and MS office 2019 home and student

I email the help desk of the software company that I bought it through and they advised this below. Feel free since you seem to provide help to many people to use this to help others. This worked for me.

Thanks for your help though, it is much appreciated.

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I believe this may be an issue listed on the following page... https://support.office.com/en-us/article/what-to-try-if-you-can-t-install-or-activate-office-for-mac-5efba2b4-b1e6-4e5f-bf3c-6ab945d03dea#bkmk_nolicensefound 

 With our experience we found the most common cause for this, and to avoid our customers having to read through and try many things from this guide, we provided the download directly. In most cases this resolves this issue. Please download and run this patch https://we.tl/t-Ql3z1S3oKv after that reopen your word or Restart your Mac and check again

 We have also create a handy video which shows you to process of installing and running this patch at https://www.youtube.com/watch?v=fO5g6GfEHMo

I did buy the current version of MS office 2019 home and student but for some reason I cannot edit an existing excel document or create a new one as it doesnt give me the option to save, save as, save a copy nothing, these options are greyed out.

I was thinking that I did something wrong in the downloading process somehow.