GCP error: Quota 'GPUS_ALL_REGIONS' exceeded. Limit: 0.0 globally

I've increased for my quota of NVIDIA K80, and received the request approval. Why am I still not able to use a VM with GPUs?

Error as shown in title.

What is the functionality of assigning quotas to specific projects?

To prevent system capacities from being exhausted without notification, you can set up quotas. Quotas are operational limits. For example, the number of gigabytes allowed for each project can be controlled so that cloud resources are optimized. Quotas can be enforced at both the project and the project-user level.

Increasing the region-specific GPU quota won't work. GPUs(all regions) have to be increased from 0. Steps as of December 2018 are below:

From top left burger menu, select, IAM & admin -> Quotas.
In filter type, select metric to be GPUs(all regions) and Location as Global
Click edit quotas and new quota limit to 1 or more