OK, thank you for the reply and offer.
I enabled debugging mode and went into the PowerPress tools page. This is what I got:
Notice: wpdb::escape is deprecated since version 3.6! Use wpdb::prepare() or esc_sql() instead. in /home/content/55/4071555/html/wp-includes/functions.php on line 2913
Strict Standards: Only variables should be passed by reference in /home/content/55/4071555/html/wp-content/plugins/p3-profiler/p3-profiler.php on line 56
Notice: Use of undefined constant picon_action - assumed 'picon_action' in /home/content/55/4071555/html/wp-content/plugins/personal-favicon/personal-favicon.php on line 116
Strict Standards: Declaration of Walker_Category_Checklist_ERP::start_lvl() should be compatible with Walker::start_lvl(&$output, $depth = 0, $args = Array) in /home/content/55/4071555/html/wp-settings.php on line 210
Strict Standards: Declaration of Walker_Category_Checklist_ERP::end_lvl() should be compatible with Walker::end_lvl(&$output, $depth = 0, $args = Array) in /home/content/55/4071555/html/wp-settings.php on line 210
Strict Standards: Declaration of Walker_Category_Checklist_ERP::start_el() should be compatible with Walker::start_el(&$output, $object, $depth = 0, $args = Array, $current_object_id = 0) in /home/content/55/4071555/html/wp-settings.php on line 210
Strict Standards: Declaration of Walker_Category_Checklist_ERP::end_el() should be compatible with Walker::end_el(&$output, $object, $depth = 0, $args = Array) in /home/content/55/4071555/html/wp-settings.php on line 210
Strict Standards: Non-static method tpg_gp_factory::create_admin() should not be called statically in /home/content/55/4071555/html/wp-content/plugins/tpg-get-posts/tpg-get-posts.php on line 48
Strict Standards: Non-static method tpg_gp_factory::create_lic_validation() should not be called statically, assuming $this from incompatible context in /home/content/55/4071555/html/wp-content/plugins/tpg-get-posts/inc/class-tpg-gp-admin.php on line 44
Strict Standards: Non-static method tpg_gp_factory::create_resp_obj() should not be called statically, assuming $this from incompatible context in /home/content/55/4071555/html/wp-content/plugins/tpg-get-posts/inc/class-tpg-lic-validation.php on line 45
Strict Standards: Declaration of Suffusion_MM_Walker_Edit::start_lvl() should be compatible with Walker_Nav_Menu::start_lvl(&$output, $depth = 0, $args = Array) in /home/content/55/4071555/html/wp-includes/theme.php on line 1731
Strict Standards: Declaration of Suffusion_MM_Walker_Edit::end_lvl() should be compatible with Walker_Nav_Menu::end_lvl(&$output, $depth = 0, $args = Array) in /home/content/55/4071555/html/wp-includes/theme.php on line 1731
Strict Standards: Declaration of Suffusion_MM_Walker_Edit::start_el() should be compatible with Walker_Nav_Menu::start_el(&$output, $item, $depth = 0, $args = Array, $id = 0) in /home/content/55/4071555/html/wp-includes/theme.php on line 1731
Notice: has_cap was called with an argument that is deprecated since version 2.0! Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead. in /home/content/55/4071555/html/wp-includes/functions.php on line 3006
Then on the home page, I got this:
Notice: wpdb::escape is deprecated since version 3.6! Use wpdb::prepare() or esc_sql() instead. in /home/content/55/4071555/html/wp-includes/functions.php on line 2913
Notice: Use of undefined constant picon_action - assumed 'picon_action' in /home/content/55/4071555/html/wp-content/plugins/personal-favicon/personal-favicon.php on line 116
Strict Standards: Declaration of Walker_Category_Checklist_ERP::start_lvl() should be compatible with Walker::start_lvl(&$output, $depth = 0, $args = Array) in /home/content/55/4071555/html/wp-content/plugins/efficient-related-posts/efficient-related-posts.php on line 594
Strict Standards: Declaration of Walker_Category_Checklist_ERP::end_lvl() should be compatible with Walker::end_lvl(&$output, $depth = 0, $args = Array) in /home/content/55/4071555/html/wp-content/plugins/efficient-related-posts/efficient-related-posts.php on line 594
Strict Standards: Declaration of Walker_Category_Checklist_ERP::start_el() should be compatible with Walker::start_el(&$output, $object, $depth = 0, $args = Array, $current_object_id = 0) in /home/content/55/4071555/html/wp-content/plugins/efficient-related-posts/efficient-related-posts.php on line 594
Strict Standards: Declaration of Walker_Category_Checklist_ERP::end_el() should be compatible with Walker::end_el(&$output, $object, $depth = 0, $args = Array) in /home/content/55/4071555/html/wp-content/plugins/efficient-related-posts/efficient-related-posts.php on line 594
Strict Standards: Non-static method tpg_gp_factory::create_process() should not be called statically in /home/content/55/4071555/html/wp-content/plugins/tpg-get-posts/tpg-get-posts.php on line 56
Strict Standards: Declaration of Suffusion_MM_Walker::start_el() should be compatible with Walker_Nav_Menu::start_el(&$output, $item, $depth = 0, $args = Array, $id = 0) in /home/content/55/4071555/html/wp-content/themes/suffusion/library/suffusion-walkers.php on line 39
Please let me know if there are other pages that would yield better error messages (FYI, the PowerPress settings page just shows the 500 Internal Server Error)