Request Headers:
---
Request URL: https://www.domain.de/wp-admin/admin-ajax.php?action=wpamelia_api&call=/settings
Request Method: POST
Status Code: 500 
Remote Address: 88.198.212.115:443
Referrer Policy: strict-origin-when-cross-origin
access-control-allow-credentials: true
access-control-allow-origin: https://www.domain.de
cache-control: no-cache, must-revalidate, max-age=0
content-type: text/html;charset=UTF-8
date: Tue, 02 Mar 2021 11:41:14 GMT
expires: Wed, 11 Jan 1984 05:00:00 GMT
referrer-policy: strict-origin-when-cross-origin
server: nginx
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
x-robots-tag: noindex
:authority: www.domain.de
:method: POST
:path: /wp-admin/admin-ajax.php?action=wpamelia_api&call=/settings
:scheme: https
accept: */*
accept-encoding: gzip, deflate, br
accept-language: de-DE,de;q=0.9,en;q=0.8,en-US;q=0.7
content-length: 64
content-type: application/json;charset=UTF-8
cookie: ...........
origin: https://www.domain.de
referer: https://www.domain.de/wp-admin/admin.php?page=wpamelia-customize
sec-ch-ua: "Chromium";v="88", "Google Chrome";v="88", ";Not A Brand";v="99"
sec-ch-ua-mobile: ?0
sec-fetch-dest: empty
sec-fetch-mode: cors
sec-fetch-site: same-origin
user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36
x-requested-with: XMLHttpRequest
action: wpamelia_api
call: /settings
{customization: {hash: "7R9Ou14dDq", primaryColor: "#B12323"}}
customization: {hash: "7R9Ou14dDq", primaryColor: "#B12323"}

Response:
---
{"message":"error evaluating function `fade` The first argument to fade must be a color index: 12423"}