Engine stats - qwant images

Engine name	Scores	Result count	Response time	Reliability
qwant images				0

Errors and exceptions

Exception	json.decoder.JSONDecodeError	Percentage	75
Parameter	Expecting value
Filename	searx/engines/qwant.py:110
Function	response
Code	search_results = loads(resp.text)

Exception	searx.exceptions.SearxEngineAPIException	Percentage	25
Parameter	API error::unknown
Filename	searx/engines/qwant.py:123
Function	response
Code	raise SearxEngineAPIException('API error::' + msg)

**Version of SearXNG, commit number if you are using on master branch and stipulate if you forked SearXNG**
Repository: https://github.com/searxng/searxng
Branch: master
Version: %cs.e568da23

**How did you install SearXNG?**

**What happened?**

**How To Reproduce**

**Expected behavior**

**Screenshots & Logs**

**Additional context**

**Technical report**

Error
  * Error: json.decoder.JSONDecodeError
  * Percentage: 75
  * Parameters: `('Expecting value',)`
  * File name: `searx/engines/qwant.py:110`
  * Function: `response`
  * Code: `search_results = loads(resp.text)`

Error
  * Error: searx.exceptions.SearxEngineAPIException
  * Percentage: 25
  * Parameters: `('API error::unknown',)`
  * File name: `searx/engines/qwant.py:123`
  * Function: `response`
  * Code: `raise SearxEngineAPIException('API error::' + msg)`