Engine stats - qwant images

Engine name

Scores

Result count

Response time

Reliability

qwant images

0.6

0.5

	Total	HTTP	Processing
Median	0.5	0.4	0.1
P80	0.6	0.5	0.1
P95	1.2	1.2	0.0

Errors and exceptions

Exception	json.decoder.JSONDecodeError	Percentage	35
Parameter	Expecting value
Filename	searx/engines/qwant.py:190
Function	parse_web_api
Code	search_results = loads(resp.text)

**Version of SearXNG, commit number if you are using on master branch and stipulate if you forked SearXNG**
<!-- If you are running on master branch using git execute this command
in order to fetch the latest commit ID:
```
git log -1
```
If you are using searxng-docker then look at the bottom of the SearXNG page
and check for the version after "Powered by SearXNG"

Please also stipulate if you are using a forked version of SearxNG and
include a link to the fork source code.
-->
**How did you install SearXNG?**

**What happened?**

**How To Reproduce**

**Expected behavior**

**Screenshots & Logs**

**Additional context**

**Technical report**

Error
  * Error: json.decoder.JSONDecodeError
  * Percentage: 35
  * Parameters: `('Expecting value',)`
  * File name: `searx/engines/qwant.py:190`
  * Function: `parse_web_api`
  * Code: `search_results = loads(resp.text)`

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