[3.0.x.x - Fix] Bug - Settings Store Location

OC Version: v2.3 - v3.0.2.0
Theme: default
Issue Situation: Multistore installation. Configured a 2nd Store and a Store Location.
Issue: OpenCart Issue Ref. #6364
1st step - Activate in (2nd) Store the Store Location (1st time save it is activated and present in the FE )
2nd step - Open Store settings and save again. Then the Store Location is deactivated and missing in FE.
(In the default store the problem is not present.)
Solution: Download & install BugFix - Settings Store Location or
Open file 'admin/controller/setting/store.php'
go to '$this->config->get('config_location');'
and replace with '$store_info['config_location'];'
.