Warzone download completed but won't play

Hi all,

I downloaded Warzone which took about 4 hours as the file was 123GB I think and my SSD has 190GB spare so plenty of space.

It downloaded the game file with 48 MB left to go and Battle.net just closed itself down!

When I re-open Battle.net I see the blue button to play Warzone but it opens the dialogue box for downloading the game… but it just says insufficient hard drive space as if it is wanting to download the complete file system again??

Does it not recognise in my SSD that the vast majority of the download is there and just get the last few megabytes of data??

How do I make it realise It is there and carry on?

Thanks

Andrew