Quicksaves not working

[Pie Guy]

Like, at all.

They straight-up don't work.

When I press F5, it says "Quicksaving..." and when I press F9, it says "Hold F9 to load quicksave" like it should say, but nothing happens. If I open the menu and hit "save" and create a quicksave that way, then go back and hit the "load" button on that quicksave, nothing happens. The game continues on as normal. I'm playing in a sandbox world with the difficulty settings set to allow quicksaves.

My mods are as follows:
Click through blocker
Toolbar control
Astrogator
Atmospheric Autopilot
B9 Procedural Wings
B9 Part switch
Better burn time
Better time warp
Camera tools
Chatterer
Community category kit
Community resource pack
Connected living space
Continuous collisions
Cryoengines
Cryotanks
Community terrain texture pack
Deepfreeze
Deployable engines
Distant objects
Dynamic battery storage
Engine lighting relit
EVE
Far future technologies
Firespitter
FMRS
HeatControl
KAS
Kerbal Atomics
Kerbal Actuators
Kerbal Engineer
Kerbal Reusability Expansion
Kerbaltek
Kopernicus
Mk2 Expansion
Modular flight integrator
Module manager
Near Future construction, electrical, exploration, launch vehicles, props, and propulsion
OPM + Parallax
OPT + OPT reconfig
Parallax, stock textures
Planetshine
Reentry particle effect renewed
RSE
Scatterer
Space dust
Station parts expansion redux
Waterfall
SystemHeat
TAC Life support
Trajectories