Slack Webhook failed with message "Webhook test failed. Please verify that the webhook URL is valid."

I am on Airbyte version 0.43.0
I am currently setting up Slack notification, The generated incoming web hook work fine (testing with curl). But same url is resulting in error message
"“Webhook test failed. Please verify that the webhook URL is valid.”

I have attached screenshot for curl test result and airbyte error page


“Webhook test failed. Please verify that the webhook URL is valid.”

A further test shows that Airbyte version 0.40.32 is successful
![Screen Shot 2023-04-07 at 10.01.52|690x431]