Cannot run bash script Cisco Anyconnect. "Sorry, you need user privileges to run this script." When executing as root

For work i need to install Cisco Anyconnect and i can't get it to install due to a rights issue. I have everything set up, i think correctly. I'm following this instruction.

After step 8 (executing the bash script), i keep on getting the error message "Sorry, you need super user privileges to run this script".

The script should have access to /opt/

What i've done to fix this:

• I've followed the instructions and of course used sudo
• Run script as root user (su -c etc)
• Edited permissions of the /opt/ folder chmod 755
• Changed owner of script and /opt/ to my user account(and reverted, no fix)
• Created a new folder /opt2/ and edited the script to use that folder

Anyone can help me fix this?

Edit: i'm using Ubuntu 22.04.3 LTS

Script rights

• file: vpn_install.sh
• owner: username
• group: root
• user::rwx
• group::rwx
• other::rwx

/opt/ rights

• file: opt/
• owner: root
• group: root
• user::rwx
• group::rwx
• other::rwx

Terminal output:

username@user-NUC10i7FNK:~/Documents/anyconnect/anyconnect-linux64-4.10.07073-predeploy-k9/anyconnect-linux64-4.10.07073/vpn$ sudo ./vpn_install.shInstalling Cisco AnyConnect Secure Mobility Client...Sorry, you need super user privileges to run this script.Exiting now.

Edit:

• ID my user: 1000
• ID root: 0

Script opened in text editor

# Make sure we are rootif [ `id | sed -e 's/(.*//'` != "uid=0" ]; then  echo "Sorry, you need super user privileges to run this script."  exitInstallation 1

Terminal sudo id

UID=0(root) GID=0(root) groups=0(root)

Additional info: I changed the script to run as UID 1000

New error message:

mv: can not move '/tmp/anyconnect-linux64-4.10.07073-core-vpn-webdeploy-k9-11321613022024.log' to'/opt/cisco/anyconnect/./anyconnect-linux64-4.10.07073-core-vpn-webdeploy-k9-11321613022024.log': access denied