Backend Error

Try running your site through GTMetrix and Web Page test online tools.

The P3 Performance Profiler Plugin can also help you identify slow plugins on your website.

Slowness could be due to (but not limited to):
– a poor or memory intensive theme
– poor or memory intensive plugins
– your server is slow (e.g., “process hang”, overload, you get a lot of visitors, other problems, etc.).
Test your site at (free online testing): https://gtmetrix.com/leverage-browser-caching.html , https://www.webpagetest.org/
Also, review these resources:
– https://www.wptavern.com/determining-which-plugins-are-slowing-your-site-down
– https://wordpress.stackexchange.com/questions/656/is-there-a-way-to-measure-server-resource-cpu-usage-by-wp-plugins/799#799
– also view this WP tv tutorial: https://wordpress.tv/2013/02/28/vinay-paudel-optimizing-and-speeding-up-a-wordpress-site/
– https://www.wptavern.com/my-performance-woes
– https://codex.www.ads-software.com/WordPress_Optimization
– https://codex.www.ads-software.com/High_Traffic_Tips_For_WordPress
– https://codex.www.ads-software.com/WordPress_Optimization/Caching
– https://codex.www.ads-software.com/WordPress_Optimization/WordPress_Performance

@tara, nice list of links.

I’ve had cases of slow load time that had to do with an excessive amount of database queries (in one case, it was a poorly written theme). When that happens, I’ve sometimes had better with DB Cache Reloaded Fix than with the standard caching plugins.