A fix has been implemented and we are monitoring the results.
Posted Feb 19, 2021 - 18:16 UTC
The issue has been identified and a fix is being implemented.
Posted Feb 19, 2021 - 17:49 UTC
if you try to create a new card and add a button redirecting to a URL, the button may be shown in "red", as if there is an error. Our team is investigating this issue already. Existing buttons are not affected by this issue.