This mod is super freaken cool for screenshots, I wish I had found it earlier! I have run into an issue where the maps wont drag? It was functioning properly a couple days ago with the same maps. https://nics-factorio-maps.000webhostapp.com/FactorioMaps/SeaBlockDay30/index.html#2.65,2.81,3

Quick fix - add "?v=3.3" after googleapis script in index file in line #20.

<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?v=3.3"></script>

I tried mp0011's edit and it works. Thanks for the tip!

v.3.3 has been deleted from api. Any ideas how to make this work again? (Or maybe someone has downloaded old version)

"?v=3.3" doesn't work anymore.

Haven't tested extensively, but from quick look at Google's docs and trial & error, changing the line (in the html):
map.addListener('center_changed', update_map);
to:
map.addListener('dragend', update_map);

seems to fix the problem.
Let me know if this does/doesn't fix this.

Thanks Sunakujira, works for me!