3375087 - Garbled error message in Managed System Configuration: For input string: "amF2YS5sYW5nLlN0cmluZ3w1fDQ0MzUwJCQkJCQkJCQkJCQkJCQk"

In the step "Enter System Parameters" of Managed System Configuration Java Parameter field, when clicking on the "test logon" button the garbled error message is raised: 

"Logon test failed for user XXXX, Details : Exception while trying to get InitialContext. (Cause: For input string: "amF2YS5sYW5nLlN0cmluZ3w1fDQ0MzUwJCQkJCQkJCQkJCQkJCQk") "

Also, in SMDSystem.*.log, the following error is detected:

Aug 3, 2023 9:19:01 AM [Thread[FileSystemService_356bc91e,5,main]    ] Info       Trying to get SID P4 connection using mshttps://amF2YS5sYW5nLlN0cmluZ3wyM3xuZW9hZG5hcy1wcGQubG9yZWFsLm5ldCQkJCQkJCQkJCQkJCQk
JCQk:amF2YS5sYW5nLlN0cmluZ3w1fDQ0MzUwJCQkJCQkJCQkJCQkJCQk/P4S for user XXXX/***
Aug 3, 2023 9:19:01 AM [Thread[FileSystemService_356bc91e,5,main]    ] Warning    Failed to release JNDI context:while trying to invoke the method javax.naming.InitialContext.close() of a null object loaded from local variable 'ctx'
Aug 3, 2023 9:19:01 AM [Thread[FileSystemService_356bc91e,5,main]    ] Warning    Exception while trying to get InitialContext. (Cause: For input string: "amF2YS5sYW5nLlN0cmluZ3w1fDQ0MzUwJCQkJCQkJCQkJCQkJCQk")

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• SAP Solution Manager 7.20
• SAP Solution Manager Diagnostics

DAA, Diagnostic Agent, garbled error message, test logon, Java Parameter , KBA , SV-SMG-DIA-SRV-AGT , Agent Framework , Problem