I encountered a problem where everything is properly working on pc, but on mobile phone, it is a different story. When the request is done on pc, it alerts the user on the screen that: "Name is required." and so on (I did not fill name or other properties in purpose). However, when this time I try it on mobile phone, it throws me an error that Cannot read properties of undefined (reading 'data') and gives reference to the line const data = await err.response.data;

There is a code snippet:

    try {
      const config = {
        headers: {
          "Context-Type": "application/json",
        },
      };

      const res = await axios.post(
        USERS_PATH,
        {
          name,
          surname,
          email,
          password,
          repeatedPassword,
        },
        config
      );
      console.log(res.data);
    } catch (err) {
      const data = await err.response.data;
      userCtx.updateAlertMessage(Object.values(data).flat());
    }