This error is complaining that the agent can't read the agent.scu file that contains the key to decrypt the encrypted settings in agent.properties and auto-approve.properties. Follow the steps here under the section "After the agent successfully starts, some agent properties might get encrypted..." Resolving Problems with SAS Environment Manager Agents https://go.documentation.sas.com/doc/en/evcdc/2.5_M1/evug/n07iigw9mfj4eln1nyktpc3p1x3a.htm
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