You can view the error log of the server which is running wordpress. I use nginx to run wordpress on an ubuntu system. Therefore the log is located in /var/log/nginx/error.log. I run the following terminal command to view the error log while opening the wordpress site in the browser.
tail -f -n 0 /var/log/nginx/error.log
Depending on your operating system and server software (Apache, NGINX, XAMPP, WAMP) you should google how to view the server logs.