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Error en añadir tarjetas

Antonio Seijas Montero
June 24, 2026

Desde la aplicación Trello en Mac no puedo añadir nuevas tarjetas, en cambio desde la App del iPhone si. ¿Cómo puedo solucionar este error?

1 answer

0 votes
Tomislav Tobijas
Community Champion
June 24, 2026

Hi @Antonio Seijas Montero ,

Is the button on Mac just unresponsive or are we talking about something else? Are you seeing any specific error when trying to add a card on Mac?

Like, you could try to restart the app: completely close the Trello app (Cmd + Q) and reopen it to refresh the session. Or/and log out and back in.

Potentially, you could also try a global shortcut: Control + Option + Space to add a card from anywhere on your Mac quickly. 👀

Cheers,
Tobi

Antonio Seijas Montero
June 24, 2026

Yes, I've closed the application and the problem persists.
It also happens if I access Trello through Safari.
The problem doesn't occur if I add a card from the iPhone app.

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Tomislav Tobijas
Community Champion
June 24, 2026

Can you try to open Trello in private browsing (to ensure it's not related to cache)?

Also, can you maybe check this article and try out the steps listed there: Loading resources from Trello's CDN 
It might be that, if your Mac is on a network with a firewall or security software (common in corporate environments), it may be blocking the specific domain required to create cards.

Antonio Seijas Montero
June 24, 2026

The error also occurs in Incognito mode.

I've tried it on two Macs in different locations, and the problem persists.
This error has been occurring for the last three or four days.

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Tomislav Tobijas
Community Champion
June 24, 2026

Hmmm... and if you try to open https://a.trellocdn.com/test.html, what does that show? Does the page load or not?
If it doesn't, you must allow a.trellocdn.com in your Mac's firewall or security software settings.

And have you tried this?

Potentially, you could also try a global shortcut: Control + Option + Space to add a card from anywhere on your Mac quickly. 

There's also this article Troubleshooting browser issues with Trello 
You could maybe check console errors stated at the end of the article 🤔

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