Shahriar Ahmed Biddut

Thanks for your suggestion Yui , Peace be upon you.
It was a php version issue. I updated the php version from hosting and that solved the problem.

No brother !!!!I don’t use multiple accounts to post in the forums.
You can check this link – the page shows with my posts but not showing the page number in my profile.
https://www.ads-software.com/support/profile/biddutking/page/3

Place in php file

Use Edit Author Slug Plugin to edit the author slug of a user, and change the author base.

WordPress default structure https://example.com/author/admin/

Edit Author Slug allows for https://example.com/manan-patel/admin/

Place your rel=”publisher’ code in header.php (Header Template) .

To use non WWW go to your settings.

Go to – Dashboard >> Settings >> General >> Edit your WordPress Address (URL) and Site Address (URL).
Give your non www link in the >> WordPress Address (URL) and Site Address (URL)

You may try Redirection Plugin . It may work.

Go to Appearance>Editor> themes index.php find the featured post code.The there add this code where you want to show date .
<?php the_time('j F, Y') ?>

To show the date of registration place the code in author bio codes (Author).
Registered Date : <?php echo $registered; ?>

You can use Organize Series Plugin to Organize your Blog Posts.
The Organize Series WordPress Plugin helps with the organization and presentation of articles/posts you write as part of a series. It helps make it easier for readers of your blog to discover all the series you’ve written and also to easily find post that are part of the same series.
Plugin – Organize Series

Put the code below the post title to show author name and date below the post title , in your themes single.php .

Author : <?php the_author_posts_link(); ?> , Date : <?php the_time('j F, Y ') ?>

If you want to exclude certain categories from recent in (home) WordPress theme you can use a Plugin named PE Category Filter.

Plugin is the another reason of 500 error . It could be happen for any specific plugin . For this deactivate all plugin .

=>> (Trick) If you can’t deactivate plugin normally user the trick – To deactivate plugin go to your c-panel file manager or from ftp go wp-content and change the name of plugin folder name.

After deactivate go to Dashboard and Activate plugin one by one.Then see for which plugin it is happening and delete the plugin (If you use Trick rename the plugin file before delete ) .

Sorry I forgot the rule , Jan Dembowski . Forgive me for my fault.

[ Moderator note: use of blockquote fixed. Please be careful when using that here. ]

1. You have been told that if you post articles (mine) that have already been published by other sites is a bad thing for your own blog’s health.

It’s True .If you do this you ma be penalized by Google and other Search Engines . If the work is all yours that would be good thing for your blog’s health .

2. If it is a toxic thing for my blog, will deleting all redundant work be a bad thing?

If the work is all yours don’t delete them , keep them but must follow SE Rules.If you think your work may harm your blog’s health delete them and make 301 redirection.

It is not any specific error in wordpress.It may happen because of any plugin, specific theme , .htcacess corrupted file , when php memory limits , or if there any fault in theme function. To solve this problem firstly you have to know for which reason this problem have happened .
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