Issue nextcloud connection lost?

Hi

I was wondering if someone else has had this issue before, currently running nextcloud 19.01, every time i try to upload on the web interface i get the connection lost i check the log did not find anything
this is my config

Server configuration detail

Operating system: Linux 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64

Webserver: nginx/1.19.2 (fpm-fcgi)

Database: mysql 10.4.14

PHP version: 7.4.9

Modules loaded: Core, date, libxml, openssl, pcre, zlib, filter, hash, Reflection, SPL, session, standard, sodium, cgi-fcgi, mysqlnd, PDO, xml, apcu, bcmath, bz2, calendar, ctype, curl, dom, mbstring, FFI, fileinfo, ftp, gd, gettext, gmp, iconv, igbinary, imagick, intl, json, ldap, exif, mysqli, pdo_mysql, apc, posix, readline, redis, shmop, SimpleXML, smbclient, sockets, sysvmsg, sysvsem, sysvshm, tokenizer, xmlreader, xmlwriter, xsl, zip, Phar, libsmbclient, Zend OPcache

Nextcloud version: 19.0.1 - 19.0.1.1

Updated from an older Nextcloud/ownCloud or fresh install:

Where did you install Nextcloud from: unknown

<details><summary>Signing status</summary>

Array ( )

</details>

<details><summary>List of activated apps</summary>

Enabled:
 - accessibility: 1.5.0
 - activity: 2.12.0
 - admin_audit: 1.9.0
 - cloud_federation_api: 1.2.0
 - comments: 1.9.0
 - contactsinteraction: 1.0.0
 - dav: 1.15.0
 - federatedfilesharing: 1.9.0
 - federation: 1.9.0
 - files: 1.14.0
 - files_pdfviewer: 1.8.0
 - files_rightclick: 0.16.0
 - files_sharing: 1.11.0
 - files_trashbin: 1.9.0
 - files_versions: 1.12.0
 - files_videoplayer: 1.8.0
 - logreader: 2.4.0
 - lookup_server_connector: 1.7.0
 - nextcloud_announcements: 1.8.0
 - notifications: 2.7.0
 - oauth2: 1.7.0
 - password_policy: 1.9.1
 - photos: 1.1.0
 - privacy: 1.3.0
 - provisioning_api: 1.9.0
 - recommendations: 0.7.0
 - serverinfo: 1.9.0
 - settings: 1.1.0
 - sharebymail: 1.9.0
 - support: 1.2.1
 - systemtags: 1.9.0
 - text: 3.0.1
 - theming: 1.10.0
 - twofactor_backupcodes: 1.8.0
 - updatenotification: 1.9.0
 - viewer: 1.3.0
 - workflowengine: 2.1.0
Disabled:
 - encryption
 - files_external
 - firstrunwizard
 - survey_client
 - user_ldap



</details>

<details><summary>Configuration (config/config.php)</summary>

{
    "passwordsalt": "***REMOVED SENSITIVE VALUE***",
    "secret": "***REMOVED SENSITIVE VALUE***",
    "trusted_domains": [
        "mercadeo.mydomain.com",
        "192.168.3.158"
    ],
    "datadirectory": "***REMOVED SENSITIVE VALUE***",
    "dbtype": "mysql",
    "version": "19.0.1.1",
    "overwrite.cli.url": "https:\/\/mercadeo.mydomain.com",
    "dbname": "***REMOVED SENSITIVE VALUE***",
    "dbhost": "***REMOVED SENSITIVE VALUE***",
    "dbport": "",
    "dbtableprefix": "oc_",
    "mysql.utf8mb4": true,
    "dbuser": "***REMOVED SENSITIVE VALUE***",
    "dbpassword": "***REMOVED SENSITIVE VALUE***",
    "installed": true,
    "instanceid": "***REMOVED SENSITIVE VALUE***",
    "activity_expire_days": 14,
    "auth.bruteforce.protection.enabled": true,
    "blacklisted_files": [
        ".htaccess",
        "Thumbs.db",
        "thumbs.db"
    ],
    "cron_log": true,
    "enable_previews": true,
    "enabledPreviewProviders": [
        "OC\\Preview\\PNG",
        "OC\\Preview\\JPEG",
        "OC\\Preview\\GIF",
        "OC\\Preview\\BMP",
        "OC\\Preview\\XBitmap",
        "OC\\Preview\\Movie",
        "OC\\Preview\\PDF",
        "OC\\Preview\\MP3",
        "OC\\Preview\\TXT",
        "OC\\Preview\\MarkDown"
    ],
    "filesystem_check_changes": 0,
    "filelocking.enabled": "true",
    "htaccess.RewriteBase": "\/",
    "integrity.check.disabled": false,
    "knowledgebaseenabled": false,
    "log_rotate_size": 104857600,
    "logfile": "\/data\/nextcloud.log",
    "logtimezone": "America\/Bogota",
    "memcache.local": "\\OC\\Memcache\\APCu",
    "memcache.locking": "\\OC\\Memcache\\Redis",
    "preview_max_x": 1024,
    "preview_max_y": 768,
    "preview_max_scale_factor": 1,
    "redis": {
        "host": "***REMOVED SENSITIVE VALUE***",
        "port": 0,
        "timeout": 0
    },
    "quota_include_external_storage": false,
    "share_folder": "\/Shares",
    "skeletondirectory": "",
    "trashbin_retention_obligation": "auto, 7"
}


</details>

External storages: files_external is disabled

Encryption: no

User-backends:

OC\User\Database

Browser: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Safari/537.36

Thank you