Kabam servers remove the monthly Side Quests (and monthly Event Quests) every month once their availability timer ends.Even if you were not able to do an Upgrade, the Side Quest would no longer be there.Of which, the game Requires an Update after only 2-3 days (at most) of new month version being available, so you shouldn’t even be able to run the game without updating.If you are still running a old version of the game (2+ year old, according to your post saying 2020 unless that was a typo) and still have old Side Quest content available within your game, then you must be running a very hacked/illegal copy of game app (downloaded from a non-official source), that somehow offloaded content into the App itself (instead of running from Servers).