Proot error (Huawei V20 without root)

[gufengm]

[INFO] Device architecture :- armhf
[INFO] Downloading Ubuntu image
--2021-04-21 15:42:55-- https://mirrors.ustc.edu.cn/ubuntu-cdimage/ubuntu-base/releases/20.04.1/release/ubuntu-base-20.04.1-base-armhf.tar.gz
Resolving mirrors.ustc.edu.cn... 2001:da8:d800:95::110, 202.141.160.110
Connecting to mirrors.ustc.edu.cn|2001:da8:d800:95::110|:443... connected.
Unable to establish SSL connection.

Install Ubuntu

[INFO] Create /data/data/com.termux/files/home/ubuntu-in-termux/ubuntu-fs
[INFO] Decompressing the ubuntu rootfs

gzip: stdin: unexpected end of file
tar: Child returned status 1
tar: Error is not recoverable: exiting now
/proc/self/fd/63: line 111: etc/resolv.conf: No such file or directory
[INFO] Writing stubs
/proc/self/fd/63: line 116: usr/bin/groups: No such file or directory
[INFO] Successfully wrote stubs
[INFO] Creating the start script
[INFO] Delete Ubuntu image
[INFO] Ubuntu 20.04.1 install complete
[INFO] Ubuntu setup complete
[INFO] Setting termux's .bashrc
[INFO] Setting Ubuntu's .bashrc and service.sh
/proc/self/fd/63: line 342: /data/data/com.termux/files/home/ubuntu-in-termux/ubuntu-fs/root/service.sh: No such file or directory
/proc/self/fd/63: line 379: /data/data/com.termux/files/home/ubuntu-in-termux/ubuntu-fs/root/.bashrc: No such file or directory
[INFO] Start up Ubuntu...
proot warning: can't sanitize binding "ubuntu-fs/tmp": No such file or directory
proot warning: can't chdir("/root/.") in the guest rootfs: No such file or directory
proot info: default working directory is now "/"
proot error: '/usr/bin/env' not found (root = /data/data/com.termux/files/home/ubuntu-in-termux/ubuntu-fs, cwd = /, $PATH=(null))
fatal error: see proot --help.
$

[cornjosh]

The real error should be Unable to establish SSL connection.
You can try to upgrade the CA software package, or block ipv6 and try again to solve this problem