Hi Mia,
Welcome to BuddyDev.

I am sorry I forgot to reply to your email.

The problem is most probably with php file upload settings or timing.

Please visit Dashboard->MediaPress->Tools and let me know the details. Specially, I will need the following details

PHP Upload Max Size    
PHP Post Max Size
PHP Upload Max Filesize
PHP Time Limit

Thank you
Brajesh

Thank you Mia.
The only limiting factor I see is the time Limit.

I can manage the time limit restriction inside the script itself.

For now, Can you please try changing it to a large value. It is set to 5 minutes(300 seconds) for now.

You can change the value in php.ini for the following settin

max_execution_time = 1200

Let us try with 20 minutes just for testing.

Maybe better this info…

// Generated by the MediaPress Debug tool //

Multisite: No

WordPress Version: 5.3.6
Permalink Structure: /%postname%/

Active Theme: GeneratePress Child 1.0
Parent Theme: GeneratePress Child 1.0

Registered Post Stati: publish, future, draft, pending, private, trash, auto-draft, inherit, request-pending, request-confirmed, request-failed, request-completed, closed, spam, orphan, hidden, expired, advert_tmp

// Browser Details //
Browser Name: Firefox
Browser Version: 84.0
Browser User Agent String: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0
Platform: Windows
// End Browser Section //

PHP Version: 7.2.34
PHP Extensions: Core,date,libxml,openssl,pcre,zlib,bz2,calendar,ctype,hash,filter,ftp,gettext,gmp,SPL,iconv,pcntl,readline,Reflection,session,standard,SimpleXML,sockets,mbstring,tokenizer,xml,cgi-fcgi,mysqlnd,bcmath,curl,dba,dom,enchant,fileinfo,gd,imagick,imap,intl,json,ldap,exif,mysqli,odbc,PDO,pdo_mysql,PDO_ODBC,pdo_pgsql,pdo_sqlite,pgsql,Phar,posix,pspell,redis,soap,sodium,sqlite3,sysvmsg,sysvsem,sysvshm,tidy,xmlreader,xmlrpc,xmlwriter,xsl,zip,ionCube Loader,Zend OPcache
GD enabled: Yes

//GD Info
GD Version: bundled (2.1.0 compatible)
FreeType Support: 1
FreeType Linkage: with freetype
GIF Read Support: 1
GIF Create Support: 1
JPEG Support: 1
PNG Support: 1
WBMP Support: 1
XPM Support: 1
XBM Support: 1
WebP Support: 1
BMP Support: 1
JIS-mapped Japanese Font Support:
// End GD Info

MySQL Version: 5.5.65-MariaDB
Web Server Info: Apache

WordPress Memory Limit: 40M
PHP Safe Mode: No
PHP Memory Limit: 1024M
PHP Upload Max Size: 250M
PHP Post Max Size: 260M
PHP Upload Max Filesize: 250M
PHP Time Limit: 800
PHP Max Input Vars: 1000
PHP Arg Separator: &
PHP Allow URL File Open: Yes
WP_DEBUG: Enabled
SCRIPT_DEBUG: Disabled

// Table Prefix //
Table Prefix: wp_

Show On Front: page
Page On Front: Frontpage (#27)
Page For Posts: Actividad (#7)

Session: Enabled
Session Name: PHPSESSID
Cookie Path: /
Save Path: /var/lib/php/session
Use Cookies: On
Use Only Cookies: On

DISPLAY ERRORS: N/A
FSOCKOPEN: Your server supports fsockopen.
cURL: Your server supports cURL.
SOAP Client: Your server has the SOAP Client enabled.
SUHOSIN: Your server does not have SUHOSIN installed.

ACTIVE PLUGINS:

Admin Menu Editor Pro: 2.8.2
AJAX Thumbnail Rebuild: 1.13
All In One SEO Pack: 3.6.2
Asesor de Cookies RGPD: 0.31
bbPress: 2.6.6
Block, Suspend, Report for BuddyPress (Pro): 2.0.4
BP Messages Tool: 2.1
BP Non Editable Profile Fields: 1.0.1
BP Profile Search: 5.3.3
BP Profile Shortcodes Extra: 2.5.2
BP Redirect: 1.0.0
BP Simple Front End Post: 1.3.8
BuddyBlog: 1.3.5
BuddyPress: 5.2.0
BuddyPress Follow: 1.2.2
BuddyPress Matchmaking: 1.2
BuddyPress Profile Completion: 1.0.3
BuddyPress Recent Profile Visitors: 1.6.0
BuddyPress Xprofile Custom Field Types: 1.1.5
Classic Editor: 1.5
CM Business Directory Pro: 1.9.1
CommentPress: 2.6.6
Conditional Profile Fields for BuddyPress: 1.2.4
Custom Post Type UI: 1.6.2
Custom Profile Menu for BuddyPress: 1.0.1
Device Mockups: 1.8.2
Duplicator: 1.3.28
Dynamic Visibility for Elementor: 3.0.1
Easy Google Fonts: 1.4.4
Easy Watermark: 1.0.6
Elementor: 2.9.7
Elementor Pro: 2.6.5
ElementsKit Lite: 1.4.8
Exclusive Addons Elementor: 2.0.1
Exclusive Team Elementor: 1.2.3
GEO my WP: 3.5
GMW Add-on – Buddypress Members Directory Geolocation: 1.5.6
Google Language Translator: 6.0.6
GS Posts Widget Lite: 1.2.1
iFlyChat: 4.6.4
If Menu – Visibility control for menu items: 0.15
Indeed Ultimate Membership Pro: 8.7.2
IntelliWidget Per Page Custom Menus and Dynamic Content: 2.3.9.2
Invite Anyone: 1.4.0
Livemesh Addons for Elementor: 2.8
Loco Translate: 2.3.3
Make Column Clickable Elementor: 1.3.1
MediaPress: 1.4.9
MediaPress – Media View Counter: 1.0.0
MediaPress Local Transcoder: 1.0.1
MediaPress Media Moderator: 1.0.8
MediaPress Media Rating: 1.1.1
Mega Addons For Elementor: 1.6
Piotnet Addons For Elementor: 2.4.0
Popup Trigger URL for Elementor Pro: 1.0.1
ShareThis Reaction Buttons: 1.1.5
Taxonomy Images: 1.0
Unlimited Elements for Elementor: 1.4.27
WordPress Popular Posts: 5.1.0
WordPress Responsive Age Verification: 1.3.0
WP Adverts: 1.4.1
WP Adverts – BuddyPress Integration: 1.1.2
WP Content Copy Protection & No Right Click: 2.3
WP Menu Icons: 2.0.3
WP Real Media Library (Free): 4.7.4
Youzer: 2.5.0
Youzer – Buddypress Membership Restrictions: 1.0.0
Youzer – Buddypress Moderation: 1.0.3

// MediaPress Settings //

active_components: sitewide,members,groups
default_status: public
active_statuses: public,private,friendsonly,followersonly,followingonly,groupsonly
active_types: photo,video,audio,doc
extensions: jpeg,jpg,gif,png,mp4,flv,mpeg,avi,mp3,wmv,midi,zip,gz,doc,pdf,docx,xls
size_thumbnail: 200,200,1
size_mid: 350,350,1
size_large: 1000,1000,1
single_media_size: mid
lightbox_media_size: mid
mpp_upload_space: 50000000
mpp_upload_space_groups: 50000000
show_upload_quota: 0
show_max_upload_file_size: 1
default_storage: local
enable_file_upload: 1
enable_remote: 0
enable_remote_file: 0
download_remote_file: 0
enable_oembed: 1
enable_debug: 1
enable_gallery_archive: 1
gallery_archive_slug: site-galleries
gallery_permalink_slug: site-gallery
sitewide_active_types: photo,video
sitewide_photo_gallery_default_view: default
sitewide_video_gallery_default_view: default
has_gallery_directory: 1
activity_upload: 0
activity_disable_auto_file_browser: 1
activity_photo_default_view: default
activity_video_default_view: default
activity_audio_default_view: default
activity_doc_default_view: default
show_orphaned_media: 0
delete_orphaned_media: 0
activity_media_display_limit: 1
members_active_types: photo,video
members_enable_type_filters: 1
members_photo_gallery_default_view: default
members_video_gallery_default_view: default
groups_active_types: photo,video,doc
groups_photo_gallery_default_view: default
groups_video_gallery_default_view: default
groups_doc_gallery_default_view: default
enable_group_galleries_default: yes
contributors_can_edit: 1
contributors_can_delete: 1
groups_enable_my_galleries: 1
galleries_per_page: 20
media_per_page: 20
media_columns: 5
gallery_columns: 5
show_gallery_description: 0
show_media_description: 0
enable_audio_playlist: 1
enable_video_playlist: 1
gdoc_viewer_enabled: 1
enable_media_comment: 1
enable_gallery_comment: 1
load_lightbox: 1
lightbox_media_only: 0
enable_activity_lightbox: 1
enable_gallery_lightbox: 1
enable_lightbox_in_gallery_media_list: 1
lightbox_disabled_types: doc
mpp-rating-rateable-components: sitewide,members,groups
mpp-rating-rateable-types: photo,video
mpp-rating-required-permission: loggedin
mpp-rating-appearance: single_media,light_box,single_gallery
media_view_counter_count_uploader_views: 1
media_view_counter_label_views: Vista %d veces