Thread:Project:Support desk/MyWiki: Database Error & Unknown bug/reply (9)

I am pretty sure that these issues are caused by an extension. Try deactivating half of your extensions and see, if the issue (e.g. the first issue) is then no longer present. If so, it is caused by the deactivated half; if not it is caused by the other half. Continue bisecting the according extensions until you know, which extensions are causing the issue!