1. What went wrong?

When making a commit via Collab that will either reach or exceed the tier-specified usage limit of the user's Organization then the publish is allowed to finish uploading the commit before the publish itself fails, returning with an orange error telling the user that they need to manage their usage. If the user is trying to make a large commit (2GB+) then they'll be forced to wait for the files to be uploaded first before the service returns with a failure, notifying them that their time was wasted until they manage their space first.

2. How can we repro the issue?

a) Create an org with that has Free or Standard Teams seats. Assign one of those seats to yourself.
b) Create a new project and add enough assets to get close to but not exceed the usage limit (1GB for Free, 25GB for Standard).
c) Add enough assets to reach or exceed the usage limit, then publish them via the Collab Toolbar.

Expected: Before the upload phase of the publish starts the entire publish should fail immediately with the orange error message telling them to manage their usage.
Actual: The upload phase needs to complete before the publish returns with the orange error.