The callback used to run rules currently requires clean URLs to be enabled. This makes button field impossible to use on systems where mod_rewrite or a suitable alternative is not available. This was originally pointed out by cazou in #685302: Sending email on mobile devices with a button field.

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BassistJimmyJam’s picture

BassistJimmyJam commented
Status: Active » Fixed

Fix committed.

Status: Fixed » Closed (fixed)

Automatically closed -- issue fixed for 2 weeks with no activity.