Hi Shubha,
Thanks for reaching out with your BoldGrid Post and Page Builder questions! I think the source of your issues with Post and Page builder is stemming from your Voice Theme from Mekshq.com.
This theme is not 100% compatible with Post and Page Builder because the PPB was specifically created to work with themes built on the BoldGrid Theme Framework such as our Crio Pro WordPress theme.
If you wish to continue using the Voice theme I’d suggest contacting the theme developers directly for advice on installing and using a compatible page builder.
I hope this helps Shubha! Please let us know if you have any further questions for us.