Copy/paste no longer working in Excel

Occasional Visitor


I have a problem with excel 2019. I have a calendar for work with a few coloured dates in it, When i try to copy and paste the page excel goes to not responding. I have tried several things to try to resolve the issue. If i leave it for a while it does paste the page but as soon as you try to select anything it goes to not responding. I think i still have office 2016 installed. I downloaded updates for office. 

Any suggestions please?