It's loading OK for me.
Does it work in a different browser for you or anything?
Sometimes when an update happens the url et cetera that itch is hosting from for the game (which is running in an iframe) changes, People have definitely had that trigger the privacy stuff before when it wasn't.
Unfortunately there just isn't a fix outside of trying different browser or getting the proper whitelist setup et cetera.
9 is rough. You need to farm Improved Tracking and resources for a while. And probably use a good weapon setup too.
Try running 2 deflectors, 1x Beam 2.0 or 3.0 (3.0 means more time to farm compute to max it, but you might need a ton of farm time regardless), 4x Laser Cannon (1.0 or 2.0 doesnt matter much) with Supportive Routing and support damage nodes and 1x Bomb for Volley access. Farm for a while, and then user your actives at the right time should do it.
the normal soft limit is +100%, the soft limit in the challenge is thugs +1000% or 10x. or at least I'm pretty sure it is. You can tell if you're at the soft limit or not by going to the stats and info screen and then looking at statistics and wave clears. It soft caps at 1000 wave clears, so if you have less than that it's a a ways to go yet to the soft cap