Before getting to upgradesettings page -
 
Warning: include(/var/www/html/moodle/local/login/version.php): failed to open stream: No such file 
or directory in /var/www/html/moodle/lib/classes/plugin_manager.php on line 318

Warning: include(): Failed opening '/var/www/html/moodle/local/login/version.php' for inclusion 
(include_path='/var/www/html/moodle/lib/zend:/var/www/html/moodle/lib/pear:.:/usr/share/pear:/usr/share/php') 
in /var/www/html/moodle/lib/classes/plugin_manager.php on line 318
Plugin local_login does not declare valid $plugin->component in its version.php.

    line 328 of /lib/classes/plugin_manager.php: call to debugging()
    line 348 of /lib/classes/plugin_manager.php: call to core_plugin_manager->load_present_plugins()
    line 217 of /lib/classes/plugininfo/base.php: call to core_plugin_manager->get_present_plugins()
    line 143 of /lib/classes/plugininfo/base.php: call to core\plugininfo\base->load_disk_version()
    line 97 of /lib/classes/plugininfo/base.php: call to core\plugininfo\base::make_plugin_instance()
    line 408 of /lib/classes/plugin_manager.php: call to core\plugininfo\base::get_plugins()
    line 43 of /admin/settings/plugins.php: call to core_plugin_manager->get_plugins_of_type()
    line 6933 of /lib/adminlib.php: call to require()
    line 784 of /admin/index.php: call to admin_get_root()

At upgradesettings page - 

Warning: include(/var/www/html/moodle/local/login/version.php): failed to open stream: 
No such file or directory in /var/www/html/moodle/lib/classes/plugin_manager.php on line 318

Warning: include(): Failed opening '/var/www/html/moodle/local/login/version.php' for inclusion 
(include_path='/var/www/html/moodle/lib/zend:/var/www/html/moodle/lib/pear:.:/usr/share/pear:/usr/share/php') 
in /var/www/html/moodle/lib/classes/plugin_manager.php on line 318
Plugin local_login does not declare valid $plugin->component in its version.php.

    line 328 of /lib/classes/plugin_manager.php: call to debugging()
    line 348 of /lib/classes/plugin_manager.php: call to core_plugin_manager->load_present_plugins()
    line 217 of /lib/classes/plugininfo/base.php: call to core_plugin_manager->get_present_plugins()
    line 143 of /lib/classes/plugininfo/base.php: call to core\plugininfo\base->load_disk_version()
    line 97 of /lib/classes/plugininfo/base.php: call to core\plugininfo\base::make_plugin_instance()
    line 408 of /lib/classes/plugin_manager.php: call to core\plugininfo\base::get_plugins()
    line 43 of /admin/settings/plugins.php: call to core_plugin_manager->get_plugins_of_type()
    line 6933 of /lib/adminlib.php: call to require()
    line 6818 of /lib/adminlib.php: call to admin_get_root()
    line 19 of /admin/upgradesettings.php: call to admin_externalpage_setup()

After doing save and being returned to upgradesettings page - 

Warning: include(/var/www/html/moodle/local/login/version.php): failed to open stream: 
No such file or directory in /var/www/html/moodle/lib/classes/plugin_manager.php on line 318

Warning: include(): Failed opening '/var/www/html/moodle/local/login/version.php' for inclusion 
(include_path='/var/www/html/moodle/lib/zend:/var/www/html/moodle/lib/pear:.:/usr/share/pear:/usr/share/php') 
in /var/www/html/moodle/lib/classes/plugin_manager.php on line 318
Plugin local_login does not declare valid $plugin->component in its version.php.

    line 328 of /lib/classes/plugin_manager.php: call to debugging()
    line 348 of /lib/classes/plugin_manager.php: call to core_plugin_manager->load_present_plugins()
    line 217 of /lib/classes/plugininfo/base.php: call to core_plugin_manager->get_present_plugins()
    line 143 of /lib/classes/plugininfo/base.php: call to core\plugininfo\base->load_disk_version()
    line 97 of /lib/classes/plugininfo/base.php: call to core\plugininfo\base::make_plugin_instance()
    line 408 of /lib/classes/plugin_manager.php: call to core\plugininfo\base::get_plugins()
    line 43 of /admin/settings/plugins.php: call to core_plugin_manager->get_plugins_of_type()
    line 6933 of /lib/adminlib.php: call to require()
    line 6818 of /lib/adminlib.php: call to admin_get_root()
    line 19 of /admin/upgradesettings.php: call to admin_externalpage_setup()