When i open my SharePoint Designer i get the following error:

enter image description here

What should i do to resolve it.

  • This fix above did not work as the site is not sharepoint site. This site was created outside of sharepoint. i could at one time edit non sharepoint files with Designer so what changed.
    – blkhk1up
    Jul 10 '17 at 13:38

To solve the issue, you can try the steps below and share with us the outcomes:

  1. Restart your SharePoint Designer 2013 and re-try to open the site.
  2. Clear the SharePoint Designer cache via the steps in the thread: How to Clear Your SharePoint Designer 2010/2013 Cache
  3. Reinstall the application via this location : SharePoint Designer 2013

The location where we enter the URL did make a difference for me. Please see image below.

enter image description here


Try using different connection could also solve the issue. I have experienced a similar problem with slow speed connection (a 4G modem), when using a faster connection I could connect it (another 4G network but has good coverage).

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