[No solution] Upgrade to 3.12.1 completed with warnings and errors

Hi,

I completed an upgrade to 3.12.1.

There were some warnings at the beginning of the process and many more at the end, some in the yellowish box with the yellow triangle with an exclamation mark and others in the pink box with a red hexagon with an X.

Should I be worried about these warnings (errors?)?
If so, are there known solutions?

The warnings (errors?):

At the start of /update.php:

Warning: class_implements(): Class OEmbedStreamWrapper does not exist and could not be loaded in file_get_stream_wrappers() (line 136 of /var/www/opto.cetuc.puc-rio.br/public_html/includes/file.inc).
Warning: in_array() expects parameter 2 to be array, boolean given in file_get_stream_wrappers() (line 136 of /var/www/opto.cetuc.puc-rio.br/public_html/includes/file.inc).

102 Pending Updates

During /update.php:

Warning: class_implements(): Class OEmbedStreamWrapper does not exist and could not be loaded in file_get_stream_wrappers() (line 136 of /var/www/opto.cetuc.puc-rio.br/public_html/includes/file.inc).
Warning: in_array() expects parameter 2 to be array, boolean given in file_get_stream_wrappers() (line 136 of /var/www/opto.cetuc.puc-rio.br/public_html/includes/file.inc).
Warning: class_implements(): Class OEmbedStreamWrapper does not exist and could not be loaded in file_get_stream_wrappers() (line 136 of /var/www/opto.cetuc.puc-rio.br/public_html/includes/file.inc).
Warning: in_array() expects parameter 2 to be array, boolean given in file_get_stream_wrappers() (line 136 of /var/www/opto.cetuc.puc-rio.br/public_html/includes/file.inc).

After the completion of /update.php:

[Yellowish box with yellow triangle with exclamation point]

Missing Feeds plugin OsImporterNodeProcessor. See os_bio. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_cv. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_blog_csv. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterFetcher. See os_blog_import_rss. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_classes. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_events_csv. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_ical. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_faq. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_gallery. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_documents. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_links. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_news. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_pages. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_presentation. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_people. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_feed. Check whether all required libraries and modules are installed properly.
Missing Feeds plugin OsImporterNodeProcessor. See os_software. Check whether all required libraries and modules are installed properly.
Warning in features rebuild of os_publications. No module defines permission "use text format title_filter".

[pink box with red hexagon with white X]

Strict warning: Declaration of os_reader_filter_feed_by_text::query() should be compatible with views_handler_filter::query() in _registry_check_code() (line 3161 of /var/www/opto.cetuc.puc-rio.br/public_html/includes/bootstrap.inc).
Strict warning: Declaration of os_reader_filter_feed_is_imported::query() should be compatible with views_handler_filter::query() in _registry_check_code() (line 3161 of /var/www/opto.cetuc.puc-rio.br/public_html/includes/bootstrap.inc).
Strict warning: Declaration of os_files_filter_title_file_name::query() should be compatible with views_handler_filter::query() in _registry_check_code() (line 3161 of /var/www/opto.cetuc.puc-rio.br/public_html/includes/bootstrap.inc).
Strict warning: Declaration of cp_content_handler_field_referencing_nodes::pre_render() should be compatible with views_handler_field::pre_render(&$values) in _registry_check_code() (line 3161 of /var/www/opto.cetuc.puc-rio.br/public_html/includes/bootstrap.inc).
Strict warning: Declaration of biblio_handler_citation::init() should be compatible with views_handler_field::init(&$view, &$options) in _registry_check_code() (line 3139 of /var/www/opto.cetuc.puc-rio.br/public_html/includes/bootstrap.inc).
Notice: Undefined property: MessageType::$status in _entity_defaults_rebuild() (line 831 of /var/www/opto.cetuc.puc-rio.br/public_html/profiles/openscholar/modules/contrib/entity/entity.module).
Notice: Undefined property: MessageType::$status in _entity_defaults_rebuild() (line 831 of /var/www/opto.cetuc.puc-rio.br/public_html/profiles/openscholar/modules/contrib/entity/entity.module).
Notice: Undefined property: OgMembershipType::$status in _entity_defaults_rebuild() (line 831 of /var/www/opto.cetuc.puc-rio.br/public_html/profiles/openscholar/modules/contrib/entity/entity.module).
Notice: Undefined property: OgMembershipType::$status in _entity_defaults_rebuild() (line 831 of /var/www/opto.cetuc.puc-rio.br/public_html/profiles/openscholar/modules/contrib/entity/entity.module).
Notice: Undefined property: RegistrationType::$status in _entity_defaults_rebuild() (line 831 of /var/www/opto.cetuc.puc-rio.br/public_html/profiles/openscholar/modules/contrib/entity/entity.module).

[grey box at bottom]

The following updates returned messages

os module
Update #7014

Updated home links in 0 sites

Update #7025

Updating spaces_overrides for sites using presets with modified default themes. Preset: os_scholar: 0 overrides added, 0 removed. + () - () Preset: os_project: 0 overrides added, 0 removed. + () - () Preset: os_department_minimal: 0 overrides added, 0 removed. + () - () 

Update #7027

Enabled new modules: nodeformcols, media_draggable

Update #7029

Enabled new modules: metatag, metatag_opengraph, metatag_twitter_cards
Reverted metatag and field_instance config for modules: os, vsite, os_biocv, os_blog, os_booklets, os_events, os_image_gallery, os_links, os_news, os_presentations, os_profiles, os_publications, os_software

Update #7031

Variable components of App features reverted.

os_files module
Update #7005

Deleting references to no longer existed file has performed successfully.

Update #7007

File Types and Displays have been reverted.

Update #7008

File usage has been corrected for all files

Update #7010

Moved data from Media description to OS Files Description.

Update #7011

Migrated Media Titles.

Update #7012

File Types and Displays have been reverted.

vsite module
Update #7021

Meta description fields should now appear on vsite node edit forms.

Update #7022

Meta description fields should now appear on vsite node page view.

os_publications module
Update #7016

Reverted field instances for os_publications module.

cp module
Update #7003

Variable "redirect_page_cache" has been set to 1.

os_boxes module
Update #7001

Enabled oEmbedprovider and Web Widgets modules

vsite_register module
Update #7000

VSite owners were granted vsite-admin role successfully.

os_help module
Update #7000

Disabled module: advanced_help

os_dataverse module
Update #7001

Updated 0 sites.