Proxmox_Subscription.sh

# Proxmox 6.2 and UP
# STEP1 - ssh to your proxmox server

# STEP2 - go to this dir
$ cd /usr/share/javascript/proxmox-widget-toolkit/

# STEP3 - create a backup of you proxmoxlib.js
$ cp proxmoxlib.js proxmoxlib.js.bak

# STEP3 - now edit proxmoxlib.js
$ vim proxmoxlib.js
# Search for
Ext.Msg.show({
  title: gettext('No valid subscription'),

# Replace with
void({
  title: gettext('No valid subscription'),

# STEP4 - Restart preproxy service
$ systemctl restart pveproxy.service

# To Check ( it'ss working or not )
$ grep -n -B 1 'No valid sub' proxmoxlib.js
# Note: After this clear browser cache and restart the browser