Maybe should have waited...

[tweakender]

[?] Delete downloaded rootfs file? [y/N] n

[*] Configuring NetHunter for Termux ...
~ $ nh
proot error: execve("/usr/bin/env"): Function not implemented
proot info: possible causes:

• the program is a script but its interpreter (eg. /bin/sh) was not found;
• the program is an ELF but its interpreter (eg. ld-linux.so) was not found;
• the program is a foreign binary but qemu was not specified;
• qemu does not work correctly (if specified);
• the loader was not found or doesn't work.
  fatal error: see proot --help.
  proot error: can't chmod '/data/data/com.termux/files/usr/tmp/proot-21368-36gRVD': No such file or directory how do I go back?

[Exanoff12]

what tutorial did you follow ?

looks like reinstallation is the way to go. do termux-reset and then try again. also clear out any existing catch file in ~ so something wrong doesn't happen again.