[undefined4977]

Hi,
I've read through many threads describing the same problem. However, I can't seem to find one which has instructions on editing the 'the store is closed for maintenance' message directly on ecwid itself.

Could someone kindly guide me through on how to insert this javascript on the ecwid store?

<script type="text/javascript">
ecwidMessages = {
"Main.store_closed":"Coming Soon!"
};

Thank you!