Also have this issue, seems to have to do with the PATH variable set in /data/data/com.offsec.nhterm/files/usr/bin/kali, at one point I had it mostly fixed by editing the file manually (this was on 2025.2 on A13, but needed to upgrade for other reasons). It seems to also happen on 2025.2 on A15; potentially it has to do with changes in newer Android I'm not sure if it also happens on older versions.

EDIT: Reproduced the workaround, add /product/bin (or whatever directory which su gives you in an emergency shell) to the first export PATH= statement and it will work again

adb shell
su

Find su binary:

ls -l /product/bin/su /system/bin/su /system/xbin/su /sbin/su 2>/dev/null
lrwxrwxrwx 1 root root 8 1970-01-11 22:58 /product/bin/su ->

(backup) "/data/data/com.offsec.nhterm/files/usr/bin/kali"

(edit) "/data/data/com.offsec.nhterm/files/usr/bin/kali"

Add "/PATH_TO_YOUR_SU:/system/bin:" to export PATH=/data/data/com.offsec.nhterm/files/home/.nhterm/script:/data/data/com.offsec.nhterm/files/usr/bin:/data/data/com.offsec.nhterm/files/usr/sbin:/sbin:/bin

Complete:
export PATH=/product/bin:/system/bin:/data/data/com.offsec.nhterm/files/home/.nhterm/script:/data/data/com.offsec.nhterm/files/usr/bin:/data/data/com.offsec.nhterm/files/usr/sbin:/sbin:/bin

Reload nhterm

This report has been filed against an old version of Kali. We will be closing this ticket due to inactivity.

Please could you see if you are able to replicate this issue with the latest version of Kali Linux (https://www.kali.org/get-kali/)?

If you are still facing the same problem, feel free to re-open the ticket. If you choose to do this, could you provide more information to the issue you are facing, and also give information about your setup?
For more information, please read: https://www.kali.org/docs/community/submitting-issues-kali-bug-tracker/