GetAllManifestFiles: Unable to load maplist.txt?!

Can someone help? I start gmod (it loads a lot faster than usual), but then when I want to try singleplayer, all the maps are gone, except the default ones. It worked perfectly before, and all the maps/addons are in the right place. I don’t know if this is in the right forum or has been posted, because I also can’t search Facepunch, and I get redirected to here: http://www.facepunch.com/search.php?do=process
Also, all my bindings have been resetted!
Here’s what was in the console:


 Mounting hl2.. Not Mounting hl2 (no access)
Not Mounting hl2 (no access)
OK
Mounting ep2.. Not Mounting ep2 (no access)
No permission
Mounting tf.. OK
Mounting cstrike.. OK
Mounting dod.. Not Mounting dod (no access)
No permission
Mounting episodic.. Not Mounting episodic (no access)
No permission
Mounting hl2mp.. OK
Mounting portal.. OK
Mounting lostcoast.. Disabled
Mounting hl1.. Not Mounting hl1 (no access)
No permission
Mounting hl1mp.. Not Mounting hl1mp (no access)
No permission
Mounting zeno_clash.. Not Mounting zeno_clash (no access)
No permission
Parent cvar in server.dll not allowed (sk_apc_missile_damage)
maxplayers set to 128
Parent cvar in server.dll not allowed (sv_scriptenforcer_initialkick)
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
Didn't find particle function Rotation Orient Relative to CP
maxplayers set to 1
Unknown command "sv_backspeed"
GetAllManifestFiles:  Unable to load maplist.txt