If you’re running v4.9.3, you will unfortunately have to do a manual upgrade to v4.9.4. According to its release announcement, v4.9.3 contained a bug that produces an error when you attempt to upgrade it from within the dashboard.
If you’re running v4.9.3, you will unfortunately have to do a manual upgrade to v4.9.4. According to its release announcement, v4.9.3 contained a bug that produces an error when you attempt to upgrade it from within the dashboard.