Difficulty in installing /e/ custom ROM after unlocking bootloader?

Also have a problem after unlocking bootloader. Got this info in the terminal after command “fastboot -w”:

~$ fastboot -w
wiping userdata…
Invalid erase-block-size 512: must be a power of 2 and at least 4096.
Invalid logical-block-size 512: must be a power of 2 and at least 4096.
mke2fs 1.44.1 (24-Mar-2018)
/tmp/TemporaryFile-khssws: Nicht implementierte Ext2-Bibliotheksfunktion beim Erstellen des Superblocks
/usr/lib/android-sdk/platform-tools/mke2fs failed with status 1
mke2fs failed: 1
error: Cannot generate image for userdata

Is there anyone with an idea?