wp-cron.php made me mad.

This may be a plugin or theme conflict. 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.

See https://www.wpbeginner.com/plugins/how-to-deactivate-all-plugins-when-not-able-to-access-wp-admin/

i been running couple WPs in one server. one day , all of WPs were white out.
its seem like one an error affected its conflict problem(s).

i already turn PGs off and re-write on /wp-admin file but i coudn’t find it.

i want to know extactlly meaning of

Parse error: syntax error, unexpected ‘<‘ in /tmp/theme_temp_setupSVslXT on line 2