Crash if third party cookies are blocked

### Version
5.1.0



### Browser and OS info
Chrome  73.0.3683.103 / Windows 10





### Steps to reproduce
1. Open Chrome Dev Tools
2. Click on `Vue` tab
3. Click on settings, `vuex` state, or other tabs

### What is expected?
Anything to happen.

### What is actually happening?
Nothing happens.