Think there is an issue in the way you're using/installing tc?
When loading java.tce after starting tc in cloud mode, there's no problem.
Experience the problem when using the persistent storage.
Offtopic:
Do not really know how to maintain the storage (I'm using the tclocal file), wanted to install tcuninstall, or delete the file, and install java.tce again to see problems still there.
(But, for 12h. now, appbrowser can't connect? Get no extenssion list anymore. Rebooted without use of storage, and appbrowser gets connected again. Strange, there seems to be some relationship between using store and connection appbrowser, tried several times, same result every time).