I'm not that good, but I'm sure I saw this error before on the forums, search for it (I'm on the road now).

I'm guessing some app depended on an update of a binding that broke espeakcaller. Uninstalling it will not help, afaik. I'm guessing your best bet is to wait for an espeakcaller update. Do get a second opinion.

You might be able to force a downgrade, if the old version is available. Search the forum for a reverse depends command, that will tell you what program requires the updated version. However, this beyond my current level.

Your option, save for waiting for an update, is to check to see if there is an older version of said library and downgrade, breaking other apps. You need and expert opinion. Otherwise, there's always a fresh reflash.

Start by searching for the error, other might already have solved it.

ETA: I knew I saw it before