No search results in browser

No matter what search string I use, Deezer shows "No search results for "String ".

Note the space showed after the search string.
OS: Linux (Ubuntu), browser: Firefox. Same behavior in Chromium.
As a test I tried to to de same in Windows 10 with Edge. A search result is given (hurray), but the same behavior can be forced by altering the search string in the URL. Then the search is not working anymore. However, in Linux it isn't working at all.