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When trying to build my site with dev/build I get the below error message.
I have tried to disable debug output with :
and also with:
But nothing changes the build from breaking.
[User Warning] Cookie 'PastMember' can't be set. The site started outputting was content at line 76 in ...../silverstripe/sapphire/dev/DebugView.php
This is a bug in 2.4.0/1. It has been fixed and will be included in the 2.4.2 release. You can also try out a daily build or a recent checkout via svn of the 2.4 branch. See http://open.silverstripe.org/ticket/5780.
FYI, in the meantime until 2.4.2 is released, I've found that simply deleting all cookies for the given site allows you to do a /dev/build successfully.
... or if your site is in dev-mode just use another browser and it'll run through!
you can also just do it the old school (deprecated) way: db/build/?flush=1.
SilverStripe will grump at you and tell you to use the dev/build/?flush=1 link, but it still works just fine.
Can you explain which cookies you deleted?