DastSiteValidations::ValidateService::TokenNotFound: Could not find token

https://sentry.gitlab.net/gitlab/gitlabcom/issues/2411510/?referrer=gitlab_plugin

DastSiteValidations::ValidateService::TokenNotFound: Could not find token
  dast_site_validations/validate_service.rb:53:in `validate!'
    raise TokenNotFound.new('Could not find token') unless token_found?(response)
  dast_site_validations/validate_service.rb:21:in `execute!'
    validate!(response)
  dast_site_validation_worker.rb:26:in `perform'
    ).execute!
  sidekiq/processor.rb:192:in `execute_job'
    worker.perform(*cloned_args)
  sidekiq/processor.rb:165:in `block (2 levels) in process'
    execute_job(worker, cloned(job_hash['args']))
...
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Could not find token