Cannot install Skype for Business

When I click on install now it comes up with the following:

We're sorry Microsoft Office installer encountered a problem because you have these Click-to-Run installer based Office programs installed on your computer:

Microsoft 365 en-us

Windows Installer and Click-to-Run editions of Office programs don't get along for this version, so you can only  have one type installed at a time. Please try installing the Click-to-Run edition of Office instead, or uninstall your other Click-to-Run based Office programs and try this installation again.

If anyone could help what exact steps I need to take next would be much appreciated. I am wary of uninstalling anything incase I lose any files and the error message itself sounds like its contradicting itself.