我曾多次尝试在 Ubuntu 20.04.4 上手动安装 Adobe Reader 9，但应用程序无法启动。当我在终端中输入
acroread some_file.pdf
我得到了以下输出，但没有更多内容。没有错误，没有警告，也ps -ef没有名为 的作业acroread。
我该如何尝试修复此问题？
以下是完整但毫无意义的输出：
(acroread:17581): Gtk-WARNING **: 11:35:23.691: Unable to locate theme engine in module_path: "adwaita",
(acroread:17581): Gtk-WARNING **: 11:35:23.691: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.692: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.692: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.693: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.693: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.693: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.693: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.693: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.693: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.693: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.693: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.693: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.694: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.694: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.694: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.694: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.694: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.694: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.694: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.694: Unable to locate theme engine in module_path: "pixmap",
(acroread:17581): Gtk-WARNING **: 11:35:23.695: Unable to locate theme engine in module_path: "adwaita",
我尝试安装
sudo apt install gtk2-engines-pixbuf
但看起来它已经安装好了，并且没有改变任何东西。