Trello won't load PowerUp iframe with no error

[Dennis Kugelmann]

Hi,

I wrote a company own PowerUp, tested it until yesterday. Everything worked fine. But today the PowerUp won't load anymore and I have no idea why I didn't change something.

Any ideas?

Thanks in advance.

Dennis

[bentley · Accepted solution]

Edit on 2/12/2018: We've just launched a new Power-Up admin portal that should resolve the problems that were occurring. You can see the new admin portal at https://trello.com/power-ups/admin! You can read about what changes were made at https://developers.trello.com/v1.0/docs/migrating-manifests. And documentation for the new Power-Up can be found at https://developers.trello.com/docs/managing-power-ups.

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Hey Dennis,

We've recently made changes to the way we handle Custom Power-Ups that are likely the cause of the problem you're experiencing. The bad news is that it takes about five minutes for the custom Power-Up you registered to be available on your Trello board. The good news is that the Power-Ups menu is much faster!

Here is what is happening behind the scenes: previously the Trello web client would make a request to every registered Power-Up's manifest file, leaving the web client waiting on those other servers' responses. We've offloaded this responsibility to the Trello server so that when you register a Power-Up there is a task that queries your manifest every five minutes and stores the data on Trello's backend. Now, when the Trello client goes to load the Power-Up menu it only needs to query our server.

This is only a short-term solution as we are working on adding fields to the Custom Power-Up admin page that will allow you to give us the manifest's data directly.

How To Proceed

After registering a Power-Up, wait five minutes. If the Power-Up doesn't load as expected, then it is likely that our task failed to grab the data from the manifest and update our server. This can happen for a few reasons:

1. Manifest Unavailable - Is your manifest hosted on a server that sleeps? Be sure that your manifest is highly available.
2. Invalid SSL Certificate - Power-Ups require connector URLS and manifests to be hosted behind valid SSL certificates. Check to make sure that there are no errors in your certificate.
3. Invalid JSON - We've all left a trailing comma in an array and had some JSON parser yell at us! 😅 Double-check your manifest and ensure it contain valid JSON.

Still stuck? Don't hesitate to reach out to integrations@trello.com. We're happy to help you out!

Finally, sorry for the inconvenience. We're hopeful that a more delightful Power-Up menu experience will lead to more users enabling your awesome Power-Ups! Once we launch the new Power-Ups admin, none of these issues should persist, and the power will be in your hands.