Invalid Region or DC Identifier

Why This Error Occurred

When supplying regions configuration, you used an unknown or invalid DC identifier.

Possible Ways to Fix It

Check your vercel.json or --regions flag and make sure you are using a valid string. Regions and DCs have to be in lowercase.

Valid region identifiers:

• all (special, used to scale to all DCs, can only appear once)
• sfo
• bru
• gru
• iad

In Vercel CLI, they currently are transformed to DC identifiers before being sent to our APIs.

Valid DC identifiers:

• sfo1
• bru1
• gru1
• iad1

When passing multiple --regions as a CLI parameter, make sure they're separated by a comma (,). For example:

vercel --regions sfo,bru,gru