Hi Jan Dembowski,
I have posted code for reference only to the developer And you can ask this plugin developer that In past, this plugin was hacked and plugin developer said to update the plugin. So I updated it and still, even after updating the plugin, This malicious code is again added into my website through this plugin’s custom CSS field. And for your information, I have already added security on my website.
I found it. Thanks for your reply.
Hi Dave,
Thanks for your support, Error has been solved automatically after 2 hours.
Jigar