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We have a custom Chrome extension that creates buttons in the ADD TO CARD column on the right of open cards on the web interface.

It connects to an internal platform via an API and this stopped working this week.

I am not sure what the cause is but the  Chrome console log shows this

Access to XMLHttpRequest at '' from origin '' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: The 'Access-Control-Allow-Origin' header has a value 'null' that is not equal to the supplied origin.

Please advise how to resolve?

Another Q - if i view source on Trello boards/ cards - there is a "window.trelloVersion = 'build-xxxx';" where xxxx is a number - is this the Trello release updates? How can we see all the details updates that are on these vversions? I found this but it doesn't help to troubleshoot.

Please let me know how I can subscribe to all detailed changes?

Thank you

1 answer

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Iain Dooley Community Leader Dec 19, 2019

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