Failed to connect to "CheckList"

[alex_2_zhang]

The "Checklist" cannot be connected.

Please refer to link below:
[HLCSM-122] Understand the comm spec management - Jira

and Checklist displays as:

[Marc -Devoteam-]

Hi @alex_2_zhang 

We on the community are user like, you users of the Atlassian products.

We can't access you instance.

But this issue relates to a 3rd party app that is installed in your instance.

You could raise this with your Jira admin and/or the developer of the app.

[Tomislav Tobijas]

Hey @alex_2_zhang ,

This seems to be the Marketplace app, and with that, I'd probably recommend reaching out to the vendor directly via one of their support channels. 👀

So, you can navigate to Atlassian Marketplace > find the app and select it > open Support tab and check the list of available channels.

Vendors are usually quite responsive and they should be able to troubleshoot this with you.

Cheers,
Tobi

[Arkadiusz Wroblewski]

Hello @alex_2_zhang 

Looking at your screenshot, this doesn't seem to be an issue with Jira itself, but rather a loading failure specific to the Checklist app panel. The message "We’re having trouble connecting to Checklist" is the standard way Jira tells you that a third-party Marketplace module is failing to "talk" to the issue view.

To narrow this down, I'd suggest a few quick tests in order. Start with a full page refresh and then try opening the issue in an incognito window. If it works there, you're likely dealing with a browser extension conflict or a cached token that has gone stale. If it still fails, try switching to a different network or a mobile hotspot; it's surprisingly common for company VPNs or firewalls to block the specific external domains these checklist apps use to load their content.

Beyond the browser, you should verify with your Jira admin that the app is still enabled for that specific project and that there aren't any permission restrictions tucked away in the app's settings. If your team uses a Checklist-specific custom field, double-check that there aren't duplicate fields with the same name, as that can sometimes confuse the app's rendering logic.

Since the ticket link you shared is internal and we can't see the specifics, it would be really helpful to know:

1. Is this happening for everyone on the team, or just for you?
2. Is it broken on every issue in the project, or just this specific one?
3. Did trying a different browser or network change anything?