Errors like this are logged. Check the error log on your server. If you can’t find the log, please contact your host.
Meantime, enable wp_debug and wp_debug_log and after an error, look at wp-content/debug.log to see if anything gets logged there. https://wordpress.org/support/article/debugging-in-wordpress/
You can also try this: Please attempt to disable all plugins, and use one of the default (Twenty*) themes. If the problem goes away, enable them one by one to identify the source of your troubles.
If you cannot access wp-admin, there are other ways to deactivate plugins.
Hi,
Thanks for your advice.
Errors like this are logged. Check the error log on your server. If you can’t find the log, please contact your host.
I could login the cPanel of the host but there is no error.log on wp-content folder.
A message informed me that the error message has been sent to Administrator’s email box but I couldn’t find it.
Meantime, enable wp_debug and wp_debug_log …..
There is no wp_debug nor wp_debug_log on wp-content folder
You can also try this: Please attempt to disable all plugins, and use one of the default (Twenty*) themes. If the problem goes away, enable them one by one to identify the source of your troubles.
I have tried before posting to disable all plugins by renaming /wp-content/plugins folder as plugins.old without result. Still I couldn’t browse the website nor login
Remark: I have another website also encountering the same problem after upgrade wp version 5.7
Regards
Hi Steven,
I found the error_log file. It is on the main folder;~/piano1/error_log
It is a long file, even for “14-Mar-2021” and “15-Mar-2021”. How can I attach the file here?
There are 3 websites just found here encountering the same problem after upgrading WordPress to Version 5.7. Yesterday I upgraded WP Version 5.7 on several websites here.
Regards
Hi Steven,
End of the error_log;
....
[15-Mar-2021 02:38:46 UTC] PHP Fatal error: require(): Failed opening required '/home/ufth6i821ecd/public_html/piano1/wp-includes/https-detection.php' (include_path='.:/opt/alt/php74/usr/share/pear') in /home/ufth6i821ecd/public_html/piano1/wp-settings.php on line 174Regards
Line 174
require ABSPATH . WPINC . '/https-detection.php';
Hi Steven,
I solved my problem as follow;
1)
On host’s cPanel
Web Application
My Application (35)
-> Click View More
It starts “Installatron” Page
2)
Installatron
On this page find the domain/sub-domian of the problematic website. Click the “Update” icon (A small red icon on the right. Moving mouse pointer over it shows “Update”). Then it starts another page
3)
On “Destination Version” box,
Click the down-arrow and select (5.7 latest)
Then click “update” (at the bottom of the page, right corner)
4)
Upgrading: Processing
Wait until the progress bar to finish
5)
Click the “Update” icon again to update other applications, such as plugins, theme etc.
That is ALL. It saves me a lot of work otherwise I have to perform;
Either
Reinstall WordPress
Or
Delele the problematic website and migrate its cloned site from my local network to host server.
(I have cloned websites running on local network)
From now on I’ll update software of websites here instead of login the website and update them there.
Regards
