https://community.developer.cybersource.com/t5/cybersource-APIs/Sandbox-Merchant-Activation-Error/m-p/95672#M4407 <P>While the sandbox registration is now fixed compared to my past post, the activation url gives this error on multiple browsers.&nbsp;</P><P>&nbsp;</P><PRE>{"response":{"rmsg":"Internal server Error"}}</PRE><P>&nbsp;</P> Thu, 23 Jul 2026 08:17:12 GMT realtimothylos 2026-07-23T08:17:12Z https://community.developer.cybersource.com/t5/cybersource-APIs/Sandbox-Merchant-Activation-Error/m-p/95672#M4407 <P>While the sandbox registration is now fixed compared to my past post, the activation url gives this error on multiple browsers.&nbsp;</P><P>&nbsp;</P><PRE>{"response":{"rmsg":"Internal server Error"}}</PRE><P>&nbsp;</P> Thu, 23 Jul 2026 08:17:12 GMT https://community.developer.cybersource.com/t5/cybersource-APIs/Sandbox-Merchant-Activation-Error/m-p/95672#M4407 realtimothylos 2026-07-23T08:17:12Z