Issue concerning sandbox connection link

Hi,

Using a link connection for the sandbox gives an invalid result. In fact, I created two connection links (one for production, one for the sandbox).

When I test the connection for the production from the developer console, I get a valid result :

When I test the connection for the sandbox from the developer console, I get an invalid result :

Other message error by using DRE function on Sandbox environnement

Is this normal?

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