[BUG] Getting 'Failed to execute setRequestHeader error' when searching Chinese/Korean on Search Preview panel

As titled, I am getting the following the error when searching non-english keywords on the **Search Preview** panel.
```
TypeError: Failed to execute 'setRequestHeader' on 'XMLHttpRequest': Value is not a valid ByteString.
at vendors~main.8b56a9e2.js:89
at u.forEach (vendors~main.8b56a9e2.js:89)
at vendors~main.8b56a9e2.js:89
at new Promise ()
at e.fetch (vendors~main.8b56a9e2.js:89)
at vendors~main.8b56a9e2.js:19
at new Promise ()
at m.g [as performFetchRequest] (vendors~main.8b56a9e2.js:19)
at m.S [as msearch] (vendors~main.8b56a9e2.js:19)
at vendors~main.8b56a9e2.js:35
```