Can't create loop device for dm-crypt

I'm trying to set up a disk image to use dm-crypt with, and after using dd from /dev/urandom to create an appropriately sized random file, I modprobed the loop module and ran:
losetup /dev/loop0 /home/user/image
as specified on the Arch Linux wiki page for dm-crypt and got the error: "losetup: /dev/loop0: failed to set up loop device: No such file or directory".
I tried using the -f switch to create one, I got the error "losetup: cannot find an unused loop device: No such file or directory".
How do I get this to work? I also tried running these with sudo in case it was a permissions error, and that didn't help.

Yeah, it worked after a reboot. Thing was, modprobe loop had been done pre-kernel install, so I was a tad confused since the error didn't mention anything about a module needing loading or such. Either way, I ended up switching in the end to using veracrypt, it had better performance on my system and didn't take up an obscene amount of memory when mounting the image.

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Can't create loop device for dm-crypt

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