Why can't I reshare the story from 2020?

There could be several reasons. Maybe the original poster has disabled sharing for that particular story from 2019. Or, it could be a bug in the system that's preventing the reshare functionality from working properly.

Maybe there are some restrictions or technical glitches. Check if there are any specific rules or if your app is up to date.

Maybe it's because of the platform's settings or restrictions. Some platforms have specific rules about resharing.

Maybe there were some platform restrictions or changes in the sharing policy that year.

Could be that your account doesn't have the necessary permissions to reshare. Another possibility is that the content violated some platform policies and was blocked from being reshared. Or, it could simply be a bug in the system that needs to be fixed.

Maybe it's because the story has restrictions set by the original poster or the platform's rules.

Maybe there's a technical glitch or your account settings don't allow it.

Maybe it's a glitch in the app. Sometimes these things happen and you just have to wait for an update to fix it.

Maybe there's a glitch in the platform or your account settings are preventing it. Check for any updates or settings related to sharing.

It could be that the content you're trying to reshare doesn't meet the platform's sharing policies. Or, there might be a problem with your account settings.