PenciDesign Supporter replied
Hi,
1. This is a config file for the multilanguage plugin. The multilanguage plugin will scan all the settings on the Customizer so that it may be a problem for your site. There is no way to deactivate it permanently.
2. In this case, you should deactivate all plugins (exclude plugins that come with Soledad) and then re-activate them one by one to check which plugins cause this issue.
Regards,
PenciDesign.