That repository name is invalid.

You should be able to add your SSH key to the server on Laravel Forge and then it should work.

Thanks for the response Niban, I've added my public key to both GitHub and Forge but I'm still getting the same error. I've tested my key with GitHub and I'm successfully authenticated. Scratchy head time...

I case anyone else has a similar issue - I needed to set the correct permissions in GitHub to allow 3rd party access.

For anyone else having this issue (as this is the only page in Google ranking for the term) - go to your organisation's settings page, click "Third Party Access" and disable restrictions.

I don't think that globally removing all restrictions is the best option - works nonetheless, so did the same for now. Can somebody shed a light on how to work around the problem?

Alternate solution for those coming back to a stale project: within Forge, go to your "My Account" page, "Source Control" tab, and refresh your Github token.

this is a simple issue and its a shame that it is not well explained or accounted for..... It should not have to be this way. The error message does not bother helping what needs to be done. Refreshing bitbucket oauth token did nothing. .....

Check answer at this link https://laracasts.com/discuss/channels/general-discussion/forge-for-private-repositories