When I tried to validate salesforce via Workbench (https://workbench.developerforce.com/login.php), It is throwing me a weird Error : "An error has occurred and you have been logged out: Unknown OAuth Error. Status Code: 503"Unknown OAuth Error

Please let me know if someone else has faced this issue before and has any idea how resolve it. Thanks in Advance

  • Just try again. Might be a temporary glitch. Dec 15, 2020 at 5:18

1 Answer 1


Just try again. Might be a temporary glitch.

If it doesnt work then try removing/revoking Workbench from your User Setting, and click revoke workbench and other non used Ouath Connected apps.

enter image description here

Then try to do the same process again and check if this helps.

If you are behind a corporate proxy then host your own version of Workbench, in heroku, and then use that. Steps in Github

  • Hi Nagendra, Thanks for the response. I'm able to login and validate with Production but it is throwing the same error for all sandboxes.
    – Sharath HR
    Dec 15, 2020 at 5:51
  • Ok, then can you check in one of the sandboxes and try to revoke it from oauth connected app as shown above, Dec 15, 2020 at 5:53
  • Hi Nagendra, I think it was a technical glitch. After trying few more times, now I'm able to login with the sandbox which i needed. I did not not revoke in the OAuth connected app but still did work. Thanks for your time and help. Have a nice day.
    – Sharath HR
    Dec 15, 2020 at 6:12

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