Saving settings from /admin/settings results in 500 error

TypeError: callback is not a function
    at Config.onDatabaseLoadPackageModel (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/config/index.js:122:3)
    at Consumer.Dependable.runAction (/home/tim/dev/github/mean6/node_modules/lazy-dependable/index.js:73:22)
    at Consumer.Dependable.fire (/home/tim/dev/github/mean6/node_modules/lazy-dependable/index.js:70:53)
    at Consumer.onResolved (/home/tim/dev/github/mean6/node_modules/lazy-dependable/index.js:120:8)
    at Consumer.Dependable.resolve (/home/tim/dev/github/mean6/node_modules/lazy-dependable/index.js:56:10)
    at Meanio.Container.resolve (/home/tim/dev/github/mean6/node_modules/lazy-dependable/index.js:195:5)
    at Config.loadPackageModel (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/config/index.js:111:32)
    at Config.update (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/config/index.js:155:22)
    at exports.save (/home/tim/dev/github/mean6/node_modules/meanio-admin/server/controllers/settings.js:15:17)
    at Layer.handle [as handle_request] (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/layer.js:95:5)
    at next (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/route.js:131:13)
    at /home/tim/dev/github/mean6/node_modules/meanio-circles/server/controllers/circles.js:164:17
    at Layer.handle [as handle_request] (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/layer.js:95:5)
    at next (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/route.js:131:13)
    at Route.dispatch (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/layer.js:95:5)
    at /home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/index.js:277:22
    at Function.process_params (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/index.js:330:12)
    at next (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/index.js:271:10)
    at serveStatic (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/serve-static/index.js:74:16)
    at Layer.handle [as handle_request] (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/index.js:312:13)
    at /home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/index.js:280:7
    at Function.process_params (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/index.js:330:12)
    at next (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/index.js:271:10)
    at favicon (/home/tim/dev/github/mean6/node_modules/serve-favicon/index.js:72:7)
    at Layer.handle [as handle_request] (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/home/tim/dev/github/mean6/node_modules/meanio/lib/core_modules/server/node_modules/express/lib/router/index.js:312:13)
PUT /api/admin/settings 500 - - 10.709 ms
linnovate / meanio

Saving settings from /admin/settings results in 500 error #101
