testapp is throwing 400 while accessing database_copy api

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----------------------------- Captured stdout call -----------------------------cluster_topology: {'sync_gateways': [{'public': 'https://172.23.104.193:4984', 'admin': 'https://172.23.104.193:4985'}], 'sg_accels': [], 'couchbase_servers': ['http://172.23.104.192:8091'], 'load_balancers': []}

mode: cc

xattrs_enabled: True

{"log_level": "\"verbose\"", "directory": "\"\"", "max_rotate_count": "I2", "max_size": "L51200000", "plain_text": "true"}

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Got response: 

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{}

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"C:\Windows\Temp\\log_1626468214979"

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Log files available at - C:\Windows\Temp\\log_1626468214979

Creating a Database cbl-test1626468215.2164025 at test setup

{"password": "\"password\""}

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Got response: "@0_10.100.161.31_C"

"@0_10.100.161.31_C"

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{"name": "\"cbl-test1626468215.2164025\"", "config": "\"@0_10.100.161.31_C\""}

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Got response: "@1_10.100.161.31_C"

"@1_10.100.161.31_C"

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Getting the database name

{"database": "\"@1_10.100.161.31_C\""}

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"cbl-test1626468215.2164025"

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{"database": "\"@1_10.100.161.31_C\""}

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"C:\Users\administrator\Desktop\TestServer\testserver_windesktop_x64-3.0.0-44\cbl-test1626468215.2164025.cblite2\"

{"database": "\"@1_10.100.161.31_C\""}

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"cbl-test1626468183.1302643"

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{"database": "\"@1_10.100.161.31_C\""}

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"C:\Users\administrator\Desktop\TestServer\testserver_windesktop_x64-3.0.0-44\cbl-test1626468183.1302643.cblite2\"

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{"database": "\"@1_10.100.161.31_C\""}

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Got response: 

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{}

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Got response: "@2_10.100.161.31_C"

"@2_10.100.161.31_C"

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{"dbPath": "\"Databases/PrebuiltDB.cblite2\""}

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"Databases/PrebuiltDB.cblite2/"

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http://10.100.161.31:8080/database_copy

{"dbName": "\"copiedDB1626468183.4514902\"", "dbPath": "\"Databases/PrebuiltDB.cblite2/\"", "dbConfig": "\"@2_10.100.161.31_C\""}