LOcal by Flywheel can't download the Salient theme

I have tried 20 times at least to download the Salient theme on my local Wordpress website thru Local by Flywheel. It failed. Here is the message I always get:
Local Router Error

Our apologies for the inconvenience. The Local router is not able to connect to the site you requested.

We suggest you try the following:

    Restart Site - Go to the Local by Flywheel app and restart the site you are attempting to access.
    Contact us - If the issue persists please contact us.

Please, can anybody help me to find a solution to solve this problem? Thanks