Nature's calling can't claim claimable rewards.

this is the fix that solved my issue on ps5 

Finally got my game working again (M4 Max Macbook)! Here's what I did, though I don't know which one in particular solved my issues:

• Deleted the following cache files from my Electronics Arts/The Sims 4 folder: localthumbcache.package and avatarcache.package
• Restarted my game and changed my wifi source to my phone hotspot
• Went to Game Options -> Other unchecked the box for "Online social features access", hit apply. Rechecked it and hit apply again.

Voila! Access to my Gallery again and access to the quest, along with claiming all of my event rewards. 💚

I've finished all the past quests & claimed rewards, yet I'm 5ep short of earning the wooden throne recipe which is still locked! Unsure how to unlock since the other quests were completed.  I can't find how to earn 5ep more to unlock the recipe needed to finish.  For attached pics: No mods, on PC, I'm logged into EA app, & this character is level 10 handiness already.  I've logged out and back in multiple times now, nothing is updating, still stuck behind 5ep. I didn't see any Sims4 updates to download either.
I hope they evaluate how/why they do these quests because they always seem to have some issues...and I hope it's patched before the time limit they've set runs out.

I had that same problem, and have no idea how I fixed it. Im on PS4, been playing Sims since it came out way back in the day. The only thing I can do is describe what I did when it happened.

I was going all out on a house build with the move objects cheat on, trying to finish it up to continue the nature's calling stuff. Finished the house, managed to upload to gallery, then the game got stuck in a loading loop. I have a separate save file for codes so I can still earn trophies, it froze while switching saves.  I reloaded the game, loaded into my no codes save, placed the house, and continued on my merry sim way. When I opened the nature's calling event to claim things, it said I was offline. I tried reconnecting to EA, the game got stuck in loading again, restarted once more. I cleared the cache, loaded in, checked the event, and didn't see a popup saying I'm offline. I completed the rest of the event the same day, so I can't really say if anybody that was the grand fix. My internet is fussy being out in the county, I figured it was an issue with that. 

I'm trying to claim my items from Nature Event that is currently going on and I keep getting an error message stating Online Connection Required and underneath it says, "please go online and save your Event status to receive the awards'  Well I really hate to say this, I've been online all the time when playing this game. 

So what gives? 

Below is before I go into the game to play: 

This is in the game: 

I have this too, im on xbox, honestly at the minute im having so many glitches my saves are unplayable, hoping they all get fixed soon.

I figured out a fix console wise by accident

Sign out of your console entirely, to the point you have to reenter your email/account info and enter your password to sign in. 

Its doing it to me too and it's frustrating coz I've updated, restarted and connected to the internet.... still not working 

This type of thing is common when the servers are overtaxed. It happens on numerous game sites, and database sites like Ancestry.

Saw this