Hello, @DvApps and @Alexnader
Problem appeared because you updated plugin and did not update theme. Never update plugin without theme update. We moved some options from theme to plugin files in the last theme/plugin update, so both should be updated. If you faced that error it means you just updated plugin to version 1.2.7 but did not update theme to version 5.6. To fix the error you need to update theme to version 5.6.
Regards