Vielleicht gibt es ja neue Infos wenn Du mal PP aus dem Terminal startest, wie z.B. hier
me@xubuntu1804:~/Pfad/zu/pp_prog_0.48$ ./PortfolioPerformance
(Portfolio Performance:10819): Gtk-CRITICAL **: 21:20:45.496: gtk_hsv_to_rgb: assertion 's >= 0.0 && s <= 1.0' failed
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.thoughtworks.xstream.core.util.Fields (file:/home/mj/Dokumente/edfg/pp_prog_0.48/plugins/org.apache.servicemix.bundles.xstream_1.4.8.1.jar) to field java.util.TreeMap.comparator
WARNING: Please consider reporting this to the maintainers of com.thoughtworks.xstream.core.util.Fields
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
** (Portfolio Performance:10819): CRITICAL **: 21:20:47.031: JNI class pointer is NULL for class org/eclipse/swt/accessibility/AccessibleObject
** (Portfolio Performance:10819): CRITICAL **: 21:20:47.031: JNI class pointer is NULL for class org/eclipse/swt/accessibility/AccessibleObject
*** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug
*** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug
(Portfolio Performance:10819): Gtk-CRITICAL **: 21:20:49.764: gtk_box_gadget_distribute: assertion 'size >= 0' failed in GtkScrollbar
(Portfolio Performance:10819): Gtk-CRITICAL **: 21:20:49.764: gtk_widget_get_preferred_width_for_height: assertion 'height >= 0' failed
(Portfolio Performance:10819): Gtk-WARNING **: 21:20:49.764: gtk_widget_size_allocate(): attempt to allocate widget with width 21 and height -6
(Portfolio Performance:10819): Gtk-CRITICAL **: 21:20:49.764: gtk_box_gadget_distribute: assertion 'size >= 0' failed in GtkScrollbar
*** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug
*** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug
*** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug
*** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug
*** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug
*** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug
*** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug
*** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug
(Portfolio Performance:10819): Gtk-CRITICAL **: 21:20:49.802: gtk_box_gadget_distribute: assertion 'size >= 0' failed in GtkScrollbar
(Portfolio Performance:10819): Gtk-CRITICAL **: 21:20:49.802: gtk_box_gadget_distribute: assertion 'size >= 0' failed in GtkScrollbar
mj@xubuntu1804:~/Pfad/zu/pp_prog_0.48$
Die obigen Fehlermeldungen entstehen unter gtk 3.22.30-1ubuntu4 alle beim Start, bringen aber keine Einschränkungen mit sich - das Öffnen eines pdf-Files bringt bei mir keinen zusätzlichen Output. Das könnte bei Dir, @gsw17, ja anders sein.