[v0] Failed to check quota: Failed to execute 'json' on 'Response': Unexpected token 'I', "Internal s"... is not valid JSON at checkQuota (/hooks/use-quota) at async handleGenerate (/components/diagram-generator)

Check the debug console log.

Review the entire flow of usage
Regular users
Anonymous users
Functions for boths at /scripts folder.
How they're being handled.