. Ensure everything is up to date according to our version compatibility list here. Please follow the best practices when updating your theme and plugins. Click here for more information. Everything is up to date._
2. Go to X > Settings and click on the Clear Style Cache button. There isn't any X > Settings option in my dashboard
3. Switch to the parent theme. I don't know what this is, so I guess we don't have such thing.
4. Reset your htaccess file by renaming it to .htaccess-bak. Then in WP Admin Menu, go to Settings > Permalinks and just click the Save Changes button. I don't feel comfortable touching the htacess file, so I'm not gonna doing that
5. Increase the PHP Memory Limit of your server. Click here for more detailed information and how to increase the PHP memory limit. I can't do that. My host server don't allow it.