Cannot pick a slack channel for dashboard subscription

Hi, I had issue this morning when I want to pick a slack channel/user to send a dashboard subscription, it did not allow me to pick any channel. Usually when you click the dropdown button it lists all of the available channel or user to send the subscription, but now I clicked it and it did nothing.

Any idea what caused this? Email subscription works fine, it's just slack that I have trouble with


  "browser-info": {
    "language": "en-US",
    "platform": "Win32",
    "userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36 Edg/95.0.1020.53",
    "vendor": "Google Inc."
  "system-info": {
    "file.encoding": "UTF-8",
    "": "OpenJDK Runtime Environment",
    "java.runtime.version": "11.0.11+9",
    "java.vendor": "AdoptOpenJDK",
    "java.vendor.url": "",
    "java.version": "11.0.11",
    "": "OpenJDK 64-Bit Server VM",
    "java.vm.version": "11.0.11+9",
    "": "Linux",
    "os.version": "5.11.0-1021-aws",
    "user.language": "en",
    "user.timezone": "GMT"
  "metabase-info": {
    "databases": [
    "hosting-env": "unknown",
    "application-database": "postgres",
    "application-database-details": {
      "database": {
        "name": "PostgreSQL",
        "version": "12.7"
      "jdbc-driver": {
        "name": "PostgreSQL JDBC Driver",
        "version": "42.2.18"
    "run-mode": "prod",
    "version": {
      "date": "2021-07-14",
      "tag": "v0.40.1",
      "branch": "release-x.40.x",
      "hash": "ed8f9c8"
    "settings": {
      "report-timezone": "Asia/Jakarta"

Hi @hitomebore
You should upgrade to latest release:
It is likely caused by an unstable connection between Metabase and Slack, since the list of channels is downloaded every time, which is a known issue:
But check your logs for any errors - Admin > Troubleshooting > Logs.

1 Like

Thank you very much, will update to latest release and see if it works