Can’t sign in to SharePoint Designer

What we need is to install SharePoint Designer Service Pack 1

We downloaded SharePoint Designer Service Pack 1 and we must have an executable like the following SharePoint Designer Service Pack 1

We run it and wait for it to finish installing

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At the end it will ask us to restart the computer, click on ” Yes ” and wait for the computer to restart.

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After the computer finishes restarting, we open SharePoint Designer and click on “ Open site ”, the following window will appear.

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We select the site that we had already tried to open previously, click on the “Open” button , it will request username and password, it will begin to Communicate with the Web service and finally it will open the Site in Sharepoint Designer.

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In this way we solve the problem when wanting to open SharePoint Online sites in SharePoint Designer and it says that they do not have Permissions.