I’m working on a wordpress site which regularly sees warnings and fatal errors such as the following:
Fatal error: Call to undefined function _get_list_table() in
on line 1439
An example warning I see is:
Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘maintenance_version_check’ not found or invalid function name in /home/hannahsa/public_html/wp-includes/class-wp-hook.php on line 298
However, the strange thing is it’s not consistent to one plugin, i’ve seen it for 5 or 6 of the installed plugins, and also the errors resolve themselves after a while without any action by myself to fix. So if I see the error, leave it a few hours, and go back the error no longer shows.
The errors all seem to be regarding function issues, but I don’t think the issue is any missing plugin functions as the site regularly works fine without any errors.
If it helps I’m using the following theme: https://themeforest.net/item/health-coach-wp-theme-for-building-any-life-coach-website/12851250
Anyone seen similar before or have any idea where the issue may lie? I’m on the latest wordpress version and all plugins are up to date.