Vishnu

check this thread

https://www.ads-software.com/support/topic/warning-cannot-modify-header-information-headers-already-sent-by-2?replies=27

disable all plugin and enable one by one , may be its plugin issue

or try to change your theme

If you know how to handle database then you can reset your setting by going to wp setting table in databae and change url from database

are you using any email service like sendgrid or anything

Are you using too many plugins !
Remove unused plugin

Use wp cache plugin to open your website smothly.

Are you using SMPT Email service

have u installed any plugin recently then uninstall that , it is because of plugin also that you are facing this type of issue

open

domain.com/directory/index.html

also refer this https://developer.www.ads-software.com/reference/functions/the_excerpt/

Look like you want to add excerpt read this

https://codex.www.ads-software.com/Excerpt

Are you unsing mutiple cache plugin !
May be its clashing with some other plugin this is why its acting like this

try to find out that plugin

You will need to update manually as once automatic update fails it corrupts files

https://codex.www.ads-software.com/Upgrading_WordPress_Extended

Error 500 ISE is very generic and can be caused by various problems including server errors. Here are a few things you can try to solve it:
– Your first step should be checking your site’s error logs for a more specific error message. If you need help locating them, ask your hosting provider to help you with that.
– it could be problem with the plugins, try resetting the plugins folder by FTP or phpMyAdmin.
– it could be a problem with the theme. Momentarily, try switching to the default WordPress theme via FTP or whatever file management application your host provides by renaming your current theme to rule out any theme specific issue.
– It may also indicate a problem with the configuration on the server. Usually your hosting company tech support can help.
– If the above troubleshooting steps fail to resolve the issue, try manually re-uploading all files and folders EXCEPT the wp-config.php file and the /wp-content/ directory from a fresh download of WordPress. Make sure that you delete the old copies of files & folder before uploading the new ones. Read the Manual Update directions first!

The easiest way to do this is adding to your static page a get_posts call.

Here’s one example of a minimal Loop of that kind :

<?php
 global $post;
 $myposts = get_posts('numberposts=5&category=1');
 foreach($myposts as $post) :
 ?>
 <?php the_title(); ?>
 <?php the_content(); ?>
 <?php endforeach; ?>

You can insert it everywhere in your page : sidebar, bottom … and you can specify how many posts you’ll show (in this case I’ve set up 5), and from which category (you can use too &categoryname=WHATEVER if you prefer).

check https://codex.www.ads-software.com/Common_WordPress_Errors

It means that particular process request has exceeded the maximum allowed. Sometimes there is some breathing room and you can adjust it yourself: https://codex.www.ads-software.com/Editing_wp-config.php#Increasing_memory_allocated_to_PHP

Usually though you should contact your hosting provider. Or stop using such memory intensive plugins/themes.