When there is a 500 error it means that a fatal error occurred on the server. We need to see details of the error to try and understand why it happened.
If you edited your wp-config.php file as described in https://wpml.org/documentation/support/debugging-wpml/ then when you try again to change to languages in directories and it creates a 500 error, you should be able to see details of the error in the file wp-content/debug.log.
You can paste those details in your next reply, or you could share the debug.log file itself via dropbox or wetransfer or similar, just paste the link in here.
Here are the content of debug.log file
[26-Jul-2023 11:21:47 UTC] PHP Fatal error: Uncaught Error: Call to a member function get_404_util() on null in /nas/content/live/sifawystg/wp-content/plugins/sitepress-multilingual-cms/classes/query-filtering/class-wpml-query-parser.php:505
Stack trace:
#0 /nas/content/live/sifawystg/wp-content/plugins/sitepress-multilingual-cms/classes/query-filtering/class-wpml-query-parser.php(380): WPML_Query_Parser->maybe_adjust_name_var(Object(WP_Query))
#1 /nas/content/live/sifawystg/wp-content/plugins/sitepress-multilingual-cms/sitepress.class.php(3411): WPML_Query_Parser->parse_query(Object(WP_Query))
#2 /nas/content/live/sifawystg/wp-includes/class-wp-hook.php(308): SitePress->parse_query(Object(WP_Query))
#3 /nas/content/live/sifawystg/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters('', Array)
#4 /nas/content/live/sifawystg/wp-includes/plugin.php(565): WP_Hook->do_action(Array)
#5 /nas/content/live/sifawystg/wp-includes/class-wp-query.php(1131): do_action_ref_array('parse_query', Array)
#6 /nas/content/live/sifawystg/wp-includes/class-wp-query.ph in /nas/content/live/sifawystg/wp-content/plugins/sitepress-multilingual-cms/classes/query-filtering/class-wpml-query-parser.php on line 505
[26-Jul-2023 11:21:47 UTC] PHP Fatal error: Uncaught Error: Call to a member function get_requested_lang() on null in /nas/content/live/sifawystg/wp-content/plugins/sitepress-multilingual-cms/sitepress.class.php:1131
Stack trace:
#0 /nas/content/live/sifawystg/wp-content/plugins/sitepress-multilingual-cms/classes/utilities/class-wpml-locale.php(106): SitePress->get_current_language()
#1 /nas/content/live/sifawystg/wp-content/plugins/sitepress-multilingual-cms/sitepress.class.php(3452): WPML_Locale->locale()
#2 /nas/content/live/sifawystg/wp-includes/class-wp-hook.php(308): SitePress->locale_filter('en_US')
#3 /nas/content/live/sifawystg/wp-includes/plugin.php(205): WP_Hook->apply_filters('en_US', Array)
#4 /nas/content/live/sifawystg/wp-includes/l10n.php(80): apply_filters('locale', 'en_US')
#5 /nas/content/live/sifawystg/wp-includes/l10n.php(139): get_locale()
#6 /nas/content/live/sifawystg/wp-includes/l10n.php(868): determine_locale()
#7 /nas/content/live/sifawystg/wp-includes/class-wp-fatal-error-handler.php(47): load_default_textdomain()
#8 [intern in /nas/content/live/sifawystg/wp-content/plugins/sitepress-multilingual-cms/sitepress.class.php on line 1131
I can follow what causes the error in a narrow sense, but not in a broader sense of what prompts it to occur.
Looking at your site debug info you shared, your WP Memory Limit appears too low—below the minimum requirements shared with you earlier. Did you raise the memory limit since submitting the debug info?
See this link for how to increase the memory limit; I would recommend similar settings for the WP_MEMORY_LIMIT and WP_MAX_MEMORY_LIMIT constants as in the example below.
Hi Nigel, as I mentioned before that I checked the requirements before and the error still there including the memory limit
I attached a screenshot that shows the WP_MEMORY_LIMIT and WP_MAX_MEMORY_LIMIT which meet the requirements
OK, thanks for confirming. (The debug info you submitted shows different values memory but that can sometimes be inaccurate.)
To debug further I'll need to take a closer look at your site, if that's okay.
As this is a staging site is it okay for me to run some tests, including deactivating and reactivating plugins and possibly install utility plugins to help diagnose the problem?
If that proves inconclusive, I may need to copy your site to work on locally. Would that be okay?
If so, please share credentials in the private reply I've set for you. You may want to create a temporary admin user for me that you can later delete, and be sure to have a backup.
I deactivated all other plugins, activated WPML, and switched the language setting to use directories, to have a starting point to check WPML in isolation.
It appeared to be working fine, both on the back end and front end, no errors affecting the site.
So I gradually reactivated all of the other plugins that I had deactivated, and in the end I was able to reactivate all of them, again without creating any errors.
So now the site appears to be in the same state as when you shared it with me, without triggering the errors.
I'm not sure what would have responsible, as I don't seem to be able to reproduce them.
(The one thing I did see is that for some reason the wp-content/languages/wpml directory has had its permissions set to read-only, while it should be read-and-write. See the screenshot I took, using the Filester plugin to browse your files. That should be fixed, which you should be able to do using an FTP client, or you can ask your host to fix.)
