Unable to translate strings-Please help

Hi

All the checkboxes are disabled and when I want to save something,

It’s normal as it is explained in the documentation: “The checkbox is greyed for the strings generated by the Polylang functions, or wpml-config.xml files …”, see: https://polylang.pro/doc/strings-translation/

Have you choose to display your widget for all languages (default) or only one language?