#3 If a notice has a missing file it will prompt not found and break parts of the current page markup

I have a treatment for this, but not a prevention.

Looks like the treatment didn't fix all of them either; I found some old notices with missing files:

https://gnusocial.no/conversation/817418#notice-1127252

I found an example on another instance where it does not break the rest of the markup on the page:

Origin has the file:
https://quitter.no/notice/5450192

Remote hasn't:
https://quitter.is/conversation/2991210#notice-4893515

Maybe a bug with the current theme. I will try others later.

See here, for example, the error does not happen on quitter.es:
https://quitter.es/conversation/2935768#notice-4140994

https://gnusocial.no/conversation/2986647#notice-3202026

Second day in a row. Something to do with safebot?

I disabled StoreRemoteMedia, though I haven't seen this in a while. Either way, logging it here...

I feel confident that this happens more frequently when using StoreRemoteMedia. I can't say it's fixed, though, since clearly something attempts to load a null then breaks.

So finally getting back to this one. Disabling StoreRemoteMedia helped reduce the fail cases, but it still happens.

$ grep -irn "error showing notice" .
./lib/activityhandlerplugin.php:583:            common_log(LOG_ERR, 'Error showing notice '.$nli->getNotice()->getID().': ' . $e->getMessage());
./lib/activityhandlerplugin.php:584:            $nli->out->element('p', 'error', sprintf(_('Error showing notice: %s'), $e->getMessage()));

So basically LOC 584 sometimes breaks the markup. At this point, I've run this skip for long enough I should just fork my own copy of gnusocial and merge these changes in.