Zend certified PHP/Magento developer

Catalog Search index process unknown error: {“error”:{“root_cause”

None of the posts already present in the site as answers didn’t help me fix the following issue. Please help me get it fixed.

Catalog Search index process unknown error:
{"error":{"root_cause":[{"type":"cluster_block_exception","reason":"index [magento2_product_1_v744] blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];"}],"type":"cluster_block_exception","reason":"index [magento2_product_1_v744] blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];"},"status":403}