Cannot Save after adding one line to slack node

I been running into this issue and cant figure out what is wrong. Every time I make a small change in one of the nodes or in this case Slack node, it gives me this error:

If I remove this part from the node: it saves no problem. Is this some issue on our AWS ? thank you

  "nodes": [
      "parameters": {
        "channel": "={{$node[\"Convert_to_Json\"].json[\"new_value\"][\"channel\"][\"id\"]}}",
        "text": "=HelpDesk ticket created: ******",
        "attachments": [],
        "otherOptions": {
          "thread_ts": "={{$node[\"Convert_to_Json\"].json[\"new_value\"][\"message\"][\"ts\"]}}"
      "name": "Slack6",
      "type": "n8n-nodes-base.slack",
      "typeVersion": 1,
      "position": [
      "credentials": {
        "slackApi": "Artie "
  "connections": {}

Is the workflow active? If so, can you save it without a problem if it is inactive and you make the change then?

Same thing happens if I make it inactive. This started after one of the updates I believe, I didn’t make any changes for a while and all of the sudden I cant edit one of my big workflows and I created this one as a test, it was saving fine for some time until I added https:// line. Same thing happens if I add new slack node and just add credentials.

Which trigger is the workflow using?

it is using the webhook, but seems like this happens when ever I make small change anywhere in the workflow