Most certificates from cydia.invoxiplaygames.uk last between . After that, Apple revokes them. You will need to re-download a new certificate from the site (they usually update within 24-48 hours).

Apple may have forced the domain to be blacklisted, or the service has shut down.

: Tap Install again on the "Install Profile" page. 3. Verification & Activation

By 2026, Apple may introduce a limited sideloading framework globally (pressure from the US, Japan, and UK regulators). Until then, enterprise certificate abuse remains the easiest "no-computer, no-jailbreak" method for many users.