This morning my Pages of Wonder quest got stuck. I can submit the same items over and over again - they're not being taken from my inventory - and receive rewards - which are being added to my inventory.

I've used the troubleshooting menu to cancel all my quests. I can start new quests that are not Pages of Wonder now, but that bugged Pages of Wonder quest is still active when I go to see Alexander, and I can still submit the two items over and over.

Today when I visit Pages of Wonder it redirects me to https://kumos.subeta.net/quests/bookworm-quest/out-of-time and clicking Try Again does nothing. :/

I'm in the same boat with Maybel at the moment. I hopped over to Kumos and filed a ticket, you should probably do the same thing so that the programmers can have as much info as possible. Fingers crossed!