@Ganesh Vijayan This error is expected since creation of new LUIS resources has been stopped since April 2023. Please see the message from LUIS documentation confirming the same.
LUIS will be retired on October 1st 2025 and starting April 1st 2023 you will not be able to create new LUIS resources. We recommend migrating your LUIS applications to conversational language understanding to benefit from continued product support and multilingual capabilities.
You will have to create a language resource to use LUIS capabilities, which are now named as CLU feature under language service. Thanks!!
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