Loading a theme (994789-4 myshopify.com is blocking)

[Airika_Bali]

Guys, help me get a block (994789-4 myshopify.com is blocking ) off an online store.

My online store is up and running.
I go into the admin, click online store and the first 3 seconds of loading the theme starts with (994789-4 myshopify.com is blocking ). 

I think that because of this block my site loads very slowly.

Help to remove the block and increase the speed of the site.

I'm attaching a photo:

 

[Airika_Bali]

None. I don't know what to do.

[Airika_Bali]

exactly (