The messages from aptermlog seem relevant:
update-initramfs: Generating /boot/initrd.img-4.15.0-38-generic cryptsetup: WARNING: Option 'size' missing in crypttab for plain dm-crypt mapping cryptswap1. Please read /usr/share/doc/cryptsetup/README.initramfs and add the correct 'size' option to your crypttab(5). cryptsetup: ERROR: Couldn't resolve device /swapfile cryptsetup: WARNING: Resume target cryptswap1 uses a key file update-initramfs: Generating /boot/initrd.img-4.15.0-36-generic cryptsetup: WARNING: Option 'size' missing in crypttab for plain dm-crypt mapping cryptswap1. Please read /usr/share/doc/cryptsetup/README.initramfs and add the correct 'size' option to your crypttab(5). cryptsetup: ERROR: Couldn't resolve device /swapfile cryptsetup: WARNING: Resume target cryptswap1 uses a key file
The messages from aptermlog seem relevant:
update-initramfs: Generating /boot/initrd. img-4.15. 0-38-generic doc/cryptsetup/ README. initramfs and img-4.15. 0-36-generic doc/cryptsetup/ README. initramfs and
cryptsetup: WARNING: Option 'size' missing in crypttab for plain dm-crypt
mapping cryptswap1. Please read /usr/share/
add the correct 'size' option to your crypttab(5).
cryptsetup: ERROR: Couldn't resolve device /swapfile
cryptsetup: WARNING: Resume target cryptswap1 uses a key file
update-initramfs: Generating /boot/initrd.
cryptsetup: WARNING: Option 'size' missing in crypttab for plain dm-crypt
mapping cryptswap1. Please read /usr/share/
add the correct 'size' option to your crypttab(5).
cryptsetup: ERROR: Couldn't resolve device /swapfile
cryptsetup: WARNING: Resume target cryptswap1 uses a key file