# This is a simple method to disabling the "No valid subscription" message when signing in to the Proxmox VE dashboard.
# Works as of Proxmox VE 8.2.4

# You can optionally use this command to manually create a backup. The sed command does this automatically.
# cp /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js.bak

# The following command uses perl to replace the relevant string automatically, creating an unmodified .bak version as well.
perl -0777 -i.bak -pe "s/Ext\.Msg\.show\(\{(\n\s*title:\s*gettext\('No valid subscription'\))/void({\1/" /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js

# Or use nano and the find function (Ctrl+W shortcut) to search for "No valid sub",
# then change "Ext.Msg.show({" to "void({" on the preceding line.
# nano /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js

systemctl restart pveproxy.service

# Sign out and reload the webpage with Ctrl+Shift+R, or any method to refresh the caches.
# After logging in, you will no longer see the "No valid subscription" message.