Information Wall - too much information?

Probably not a bug, but we've recently run into an issue with our Information Wall no longer updating when edits are made.

I suspect we've just put TOO MUCH information into it - we have over 100 entries, each with around 300 words and multiple links.
I've tried removing some of the entries but it still won't update. I can't download or duplicate it, because the bottom toolbar is not enabled (and I can't update to enable it).

However, I tried the Copy button at the top, and an error popped up in the console:
QuotaExceededError: The quota has been exceeded.
function setItem in file h5p.js line 2688

Is there anything I can do to rescue this? We are using wordpress plugin v1.17.5

After a lot of trial and error I discovered the issue was caused by a link in one of the entries, presumably truncating a function somewhere. I deleted the link and everything magically started working again. Case closed!