App "store" fails to load

Nextcloud version: 15.0.5
Operating system and version: Kubuntu 18.10
Apache: 2.4.24
PHP version: 7.2.15

Apps section under admin is slow to load and the app store section under “App Bundles” never appears, just an endless spinning circle. Saw no errors in Apache logs, but I could be wrong, also saw no errors in the dev console on the browser.

I am looking to install the 2FA app and some others to improve security.

Any help would be greatly appreciated.