not responding

Unable to terraform init. Unable to view in browser.

From a previously-working TF dir:

terraform init

Initializing the backend...

Initializing provider plugins...
- Reusing previous version of hashicorp/aws from the dependency lock file
│ Error: Failed to query available provider packages
│ Could not retrieve the list of available versions for provider hashicorp/aws: could not query provider registry for
│ 421 Misdirected Request