Err_insufficient_resources

I am having an occasional error with the Sentry javascript library:

raven.min.js:2
POST
https://sentry.io/api/167251/store/?sentry_version=7&sentry_client=raven-js%2F3.26.3&sentry_key=xxx
net::ERR_INSUFFICIENT_RESOURCES

Any ideas on why this might be happening? :confused: