Adding shader fails

[jvolker]

Adding a shader file shows this empty error box:

and throws these errors on the console:

VM5097:1 POST https://api.openframe.io/v0/users/current/created_artwork 422 (Unprocessable Entity)
(anonymous) @ VM5097:1
c @ fetchJSON.js:100
(anonymous) @ fetchJSON.js:97
m @ fetchJSON.js:76
create @ artwork.js:64
(anonymous) @ createArtworkRequest.js:10
(anonymous) @ index.js:11
(anonymous) @ bindActionCreators.js:7
value @ ModalManagerContainer.js:74
y @ handleSubmit.js:44
c @ handleSubmit.js:90
value @ reduxForm.js:391
r @ ReactErrorUtils.js:26
a @ EventPluginUtils.js:89
s @ EventPluginUtils.js:112
f @ EventPluginHub.js:44
d @ EventPluginHub.js:55
n @ forEachAccumulated.js:25
processEventQueue @ EventPluginHub.js:231
r @ ReactEventEmitterMixin.js:18
handleTopLevel @ ReactEventEmitterMixin.js:29
i @ ReactEventListener.js:73
perform @ Transaction.js:138
batchedUpdates @ ReactDefaultBatchingStrategy.js:63
i @ ReactUpdates.js:98
dispatchEvent @ ReactEventListener.js:150
reactProdInvariant.js:32 Uncaught (in promise) Invariant Violation: Minified React error #31; visit http://facebook.github.io/react/docs/error-decoder.html?invariant=31&args[]=Error%3A%20The%20%60Artwork%60%20instance%20is%20not%20valid.%20Details%3A%20%60title%60%20can't%20be%20blank%20(value%3A%20undefined).&args[]= for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
    at n (https://openframe.io/assets/app.js:1:27011)
    at o (https://openframe.io/assets/app.js:32:1360)
    at i (https://openframe.io/assets/app.js:32:1490)
    at o (https://openframe.io/assets/app.js:46:10970)
    at h._reconcilerUpdateChildren (https://openframe.io/assets/app.js:83:7516)
    at h._updateChildren (https://openframe.io/assets/app.js:83:8290)
    at h.updateChildren (https://openframe.io/assets/app.js:83:8188)
    at h._updateDOMChildren (https://openframe.io/assets/app.js:82:22943)
    at h.updateComponent (https://openframe.io/assets/app.js:82:21167)
    at h.receiveComponent (https://openframe.io/assets/app.js:82:20651)