I got the upgrade notification but the online updater was not able to download the new version so I did the local upgrade and moved on. Now I am having similar issues with OPKG, it looks related to that previous error.
Additional information:
Flint 2 GL-MT6000
Connected via PPPoE directly to DIGI Spain's fiber box via ethernet.
AdGuard is NOT enabled.
WireGuard client IS enabled and connected to AirVPN.
VPN Policy Based on the VLAN.
Executing package manager
Downloading https://fw.gl-inet.com/releases/mt798x/kmod-4.5.7/aarch64_cortex-a53/mediatek/mt7986/Packages.gz
*** Failed to download the package list from https://fw.gl-inet.com/releases/mt798x/kmod-4.5.7/aarch64_cortex-a53/mediatek/mt7986/Packages.gz
Downloading https://fw.gl-inet.com/releases/mt798x/packages-4.5/aarch64_cortex-a53/glinet/Packages.gz
*** Failed to download the package list from https://fw.gl-inet.com/releases/mt798x/packages-4.5/aarch64_cortex-a53/glinet/Packages.gz
Downloading https://fw.gl-inet.com/releases/mt798x/packages-4.5/aarch64_cortex-a53/packages/Packages.gz
*** Failed to download the package list from https://fw.gl-inet.com/releases/mt798x/packages-4.5/aarch64_cortex-a53/packages/Packages.gz
Updating database.
Database update completed.
Errors
Failed to send request: Operation not permitted
Failed to send request: Operation not permitted
Failed to send request: Operation not permitted
Collected errors:
* opkg_download: Failed to download https://fw.gl-inet.com/releases/mt798x/kmod-4.5.7/aarch64_cortex-a53/mediatek/mt7986/Packages.gz, wget returned 4.
* opkg_download: Check your network settings and connectivity.
* opkg_download: Failed to download https://fw.gl-inet.com/releases/mt798x/packages-4.5/aarch64_cortex-a53/glinet/Packages.gz, wget returned 4.
* opkg_download: Check your network settings and connectivity.
* opkg_download: Failed to download https://fw.gl-inet.com/releases/mt798x/packages-4.5/aarch64_cortex-a53/packages/Packages.gz, wget returned 4.
* opkg_download: Check your network settings and connectivity.
The opkg update command failed with code 3.
Edit: been doing some reading in the forums and the common reply is to "reset to factory settings", this it not really a solution since all I did was upgrade the firmware. The device should be able to keep important settings and update the settings that need updating.