Managed to successfully get composer to install via your json file on a win 7 machine.
I might suggest dumping your core and modules (keep your project files of course) and then doing a fresh composer install.
This site requires you to update your browser. Your browsing experience maybe affected by not having the most up to date version.
Please use forum.silverstripe.org for any new questions
(announcement).
The forum archive will stick around, but will be read only.
You can also use our Slack channel
or StackOverflow to ask for help.
Check out our community overview for more options to contribute.
Managed to successfully get composer to install via your json file on a win 7 machine.
I might suggest dumping your core and modules (keep your project files of course) and then doing a fresh composer install.
Thanks Cam
I did a complete rebuild/ recompose this morning and it's working fine now.
Guess I'll have to file it away as "one of those things".
Had exactly the same issue (using WAMP under Windows). Deleting the pre-composer install framework and cms folders and running again seemed to do the trick.