Got a call from a client today who suddenly had these errors on the site, on Joomla 2.5.28
Really interesting is - no one has made edits to this site in over a month, but these errors were not observed last week, and only started showing up this morning.
Even stranger still - System error reporting was set to None. It also appeared to have ground their K2 shop to a halt, preventing anyone from adding items to their cart.
I disabled the Koowa System plugin and everything seems to be working fine, including K2, but I'm very curious as to why this happened abruptly and if there's another way to address it.
Has anyone else experienced this or heard of it? Does anyone know of a reason why this could happen?