Send to excel - MS365 apps for business

SOLVED

We have been upgraded to Microsoft 365 Apps for business. 64bit.

Which is great as we now have all the latest features however the Send to Excel Button is now not working.

Found a help page that links to a compatibility checker but the link does not work.

https://gb-kb.sage.com/portal/app/portlets/results/view2.jsp?k2dockey=200512132900480

Can any one help?