Realm Whitelist - Player names show up as searching... in yellow text

so, my realms were fine prior to the latest update.

now, i'm trying to update the whitelist, and all the whitelisted usernames show up as 'searching...'

and in the bottom middle of that window, it'll write out in red text 'Cannot find user _ _ _ _ _ _ _ _ ' where the blanks will be a whitelisted username.

also of note, whenever i attempt to edit my realm, nothing happens, but when i exit the game, and attempt to open it up again, it hangs on a black screen.

if i don't edit my realm, i can open and close the application without issue.

i'm running a samsung galaxy s1 - os 2.3.6