I have attempted to unistall and reinstall, I have the most current, uptodate version of photoshop. I continue to get these messages intermittently when trying to use certain functions of photoshop. Most specifically, this occured while using the shortcut function "crtl+ Z" to "undo tool brush", however when I perform it manually with the mouse > toolbar >edit >undo tool brush, it works successfully. Here the same thing occured when trying to manually use the object selection tool.
So basically any command I attempt to do, it does mnot allow me to do it.