OCI: Autonomous Linux Instance Configuration Failed with Error "osms flag file does not exist"

Attempting to configure an Autonomous Linux Instance fails with the error "osms flag file does not exist".

The OSMS Agent log shows the following errors:

2024-01-17 10:06:46,441 - INFO - Starting action checker
2024-01-17 10:06:46,442 - INFO - gRPC Start: OSMS Agent service started
2024-01-17 10:06:49,005 - ERROR - Error checking actions (next check in 240 seconds): Command: ['osms', '--log-level', 'INFO', 'register', '--server-url', 'http://127.0.0.1:9003/XMLRPC'] failed (1): stderr: b'' stdout: b'Command failed: <ProtocolError for http://127.0.0.1:9003/XMLRPC: 403 403 Client Error: Forbidden for url: http://127.0.0.1:9003/XMLRPC>\n'
2024-01-17 10:10:50,146 - ERROR - Error checking actions (next check in 480 seconds): Command: ['osms', '--log-level', 'INFO', 'register', '--server-url', 'http://127.0.0.1:9003/XMLRPC'] failed (1): stderr: b'' stdout: b'Command failed: <ProtocolError for http://127.0.0.1:9003/XMLRPC: 403 403 Client Error: Forbidden for url: http://127.0.0.1:9003/XMLRPC>\n'