Slack Attachment not working with ChatOps

Hello, we are using InsightConnect ChatOps extension with Slack and there is no problem while sending messages, but when I add the Attachment JSON, I encounter the message “an unknown error occurred”. An example of the configuration I entered is as follows;

Attachment JSON:

[{
			"blocks": [
				{
					"type": "section",
					"text": {
						"type": "mrkdwn",
						"text": "*Alternative hotel options*"
					}
				},
				{
					"type": "section",
					"text": {
						"type": "mrkdwn",
						"text": "<https://example.com|Bates Motel> :star::star:"
					},
					"accessory": {
						"type": "button",
						"text": {
							"type": "plain_text",
							"text": "View",
							"emoji": true
						},
						"value": "view_alternate_1"
					}
				},
				{
					"type": "section",
					"text": {
						"type": "mrkdwn",
						"text": "<https://example.com|The Great Northern Hotel> :star::star::star::star:"
					},
					"accessory": {
						"type": "button",
						"text": {
							"type": "plain_text",
							"text": "View",
							"emoji": true
						},
						"value": "view_alternate_2"
					}
				}
			]
		}]

And other configs;

Screen Shot 2023-02-02 at 12.15.28

And output:

Screen Shot 2023-02-02 at 12.14.39
Screen Shot 2023-02-02 at 12.15.03
Screen Shot 2023-02-02 at 12.16.38

How can we solve this problem, I couldn’t find a detailed log about it?