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We are using a DocuSign integration configured and tested successfully in the development environment with a DocuSign developer account.
However, we are encountering issues during the authorization phase when using the authorization link.
The authorization flow redirects correctly to DocuSign, and the login page is displayed, allowing the user to log in successfully. However, after the login, the system does not return the authorization token to the application as expected.
By checking the application logs, we can see the following error during the OAuth callback processing. This error appears multiple times; below is one example:
2026-04-21 05:57:39,619 [http-nio-8080-exec-794] ERROR com.appiancorp.connectedsystems.http.oauth.OAuthServlet - Error processing request to Appian OAuth callback URL. com.appiancorp.suiteapi.common.exceptions.AppianException: Failed to decrypt. Only values of type Encrypted Text can be decrypted. (APNX-1-4260-002)
It seems that the OAuth callback is reached, but the token exchange or decryption step is failing.
I'm trying to recreate connected system or new keys on docusing, but without success.
The AUTHORIZE button in the connected system, go, but we have multiple singers and we have to use authorization link in interface
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This sounds incredibly frustrating. Dealing with OAuth issues, especially when decryption fails after a successful login, is a nightmare. It reminds me of trying to get a complicated feature to work in Snow Rider , only to hit a wall right at the last step. Hope you figure out that decryption problem soon!