Forerunner 245 not syncing

Hi,

The GPs signal on my Forerunner 245 keeps dropping so I connected it to garmin Express to check if there are any updates. 

I downloaded the updates however there was a message popping up on Express that said "some items could not be sent to your device" (latest step / wellness data (server busy).

This did not resolve the issue with the GPs so I tried again to run updates a day later and I got the same error message.

Can you help?

Many thanks,

Sara