Problem in my web

Hi!

I have a problem on my website, my users tell me that sometimes my website is not seen and others if, I get an error 500 but the hosting tells me that it is not the server’s problem. I don´t Know

Can someone check my web

My web is https://antoniofmunoz.com

https://sitecheck.sucuri.net/results/https/antoniofmunoz.com

More than likely seen as a bad webhost for the IP you share with other domains on 104.28.30.62.

Probably this link could also being flagged:
-https://www.facilisimo.com/red/iframe.cfm?ic=2-1&id=1082707&bg=FFFFFF
K7AntiVirus flags

Check plug-ins for updates: The following plugins were detected by reading the HTML source of the WordPress sites front page.

table-of-contents-plus latest release (1601)
http://dublue.com/plugins/toc/
duracelltomi-google-tag-manager latest release (1.9.2)
https://gtm4wp.com/
phspeed
granular-controls-for-elementor latest release (1.0.5)
https://github.com/norewp/granular-controls-elementor
ultimate-elementor
social-pug latest release (1.5.1)
http://www.devpups.com/social-pug/
wordpress-seo latest release (9.7)
https://yoa.st/1uj
elementor-pro
contact-form-7 latest release (5.1.1)
https://contactform7.com/
elementor latest release (2.4.7)
https://elementor.com/

polonus (volunteer website security analyst and website error-hunter)