[ERROR] Exception occurred: ISPConfigClassException -> No class file for ISPConf

Good afternoon, when installing automatically, an error occurs [ERROR] Exception occurred: ISPConfigClassException -> No class file for ISPConf igBaseOS found. (/ispconfig.ai.php:15)
# wget -O - https://get.ispconfig.org | sh -s -- --no-mail --no-dns --use-php=system

1. Everything is installed up to this point
Creating config file /etc/php/8.3/cli/php.ini with new version
Setting up php-cli (2:8.3+93ubuntu2) ...
update-alternatives: using /usr/bin/php.default to provide /usr/bin/php (php) in auto mode
update-alternatives: using /usr/bin/phar.default to provide /usr/bin/phar (phar) in auto mode
update-alternatives: using /usr/bin/phar.phar.default to provide /usr/bin/phar.p har (phar.phar) in auto mode
Processing triggers for man-db (2.12.0-4build2) ...
Processing triggers for php8.3-cli (8.3.6-0ubuntu0.24.04.8) ...
Scanning processes...
Scanning linux images...

Running kernel seems to be up-to-date.

No services need to be restarted.

No containers need to be restarted.

No user sessions are running outdated binaries.

No VM guests are running outdated hypervisor (qemu) binaries on this host.
Selecting previously unselected package php8.3-mbstring.
(Reading database ... 88494 files and directories currently installed.)
Preparing to unpack .../php8.3-mbstring_8.3.6-0ubuntu0.24.04.8_amd64.deb ...
Unpacking php8.3-mbstring (8.3.6-0ubuntu0.24.04.8) ...
Selecting previously unselected package php-mbstring.
Preparing to unpack .../php-mbstring_2%3a8.3+93ubuntu2_all.deb ...
Unpacking php-mbstring (2:8.3+93ubuntu2) ...
Setting up php8.3-mbstring (8.3.6-0ubuntu0.24.04.8) ...

Creating config file /etc/php/8.3/mods-available/mbstring.ini with new version
Setting up php-mbstring (2:8.3+93ubuntu2) ...
Processing triggers for php8.3-cli (8.3.6-0ubuntu0.24.04.8) ...
Scanning processes...
Scanning linux images...

Running kernel seems to be up-to-date.

No services need to be restarted.

No containers need to be restarted.

No user sessions are running outdated binaries.

No VM guests are running outdated hypervisor (qemu) binaries on this host.
2.Then everything freezes for 10 minutes and the following message appears
gzip: stdin: unexpected end of file
tar: Unexpected EOF in archive
tar: Unexpected EOF in archive
tar: Error is not recoverable: exiting now
Failed extracting Autoinstaller
WARNING! This script will reconfigure your entire server!
It should be run on a freshly installed server and all current configuration tha t you have done will most likely be lost!
Type 'yes' if you really want to continue: yes
[ERROR] Exception occurred: ISPConfigClassException -> No class file for ISPConf igBaseOS found. (/ispconfig.ai.php:15)
3.Installation occurs on a clean Hiper-v virtual machine

 

I live in Russia, does that have any effect?

 

Unfortunately, Russia is blocked, but not on your side. Can you tell me how to install ISPconfig multi-server through manual installation?

 

I understand the reason, Russia blocks Cloudflare services, I have a question, can you make an installation script similar to Webmin, or create a manual installation instruction from the downloaded file, then Russian users will be able to install ISPconfig?

 

For your information, packages from Russia are blocked on 32279.your-cloud.host. We have an expression for putting our pants on over our heads, and in order to download the installer, I had to first upload it to a server in the Netherlands, then copy it to my server in Russia, and only then was I able to install it using ./ispc3-ai.sh Till. Thank you so much for your help!