Custom Styles Not Working

Wordpress Version 4.7.5
Intergeo Maps Version 2.1.3

In response to this article:
https://ww.wp.xz.cn/support/topic/own-style-not-working-anymore/

I don’t know why the article was closed but the Custom Styles option still doesn’t work. Is there going to be any fix to this soon?

It saves the code in the Custom Styles section perfectly, but the map thumbnail or the map on my live websites do not inherit the styles.