[UnexpectedValueException] Could not parse version constraint : Invalid version string "" about composer-asset-plugin HOT 4 CLOSED

Yes, that's the problem. I will make the fix this afternoon

from composer-asset-plugin.

Fixed by c8c0cf1.

from composer-asset-plugin.

For your example, you must add @dev, because the version 1.0.1 is a alias of dev-master branch:

{
    "require": {
        "bower-asset/jquery-sticky" : "~1.0@dev"
    }
}

from composer-asset-plugin.

That was fast. Thanks!
And thanks also for the heads-up about the dev branch.

from composer-asset-plugin.