ERROR: Dropbox API: (6) Couldn’t resolve host ‘content.dropboxapi.com’

Hello!

Thanks always for the great plugin and today I ask, please help with the problem:

ERROR: Dropbox API: (6) Could not resolve host ‘content.dropboxapi.com’

This started today, 1/18/2017.

I could not find a solution.

Can you help?

Thank you very much!`

Log:
[INFO] BackWPup 3.3.4; A project of Inpsyde GmbH
[INFO] WordPress 4.7.1 on http://site.com/
[INFO] Log Level: Normal 
[INFO] BackWPup job: Bkp 
[INFO] Logfile is: backwpup_log_999_2017-01-18_22-00-50.html
[INFO] Backup file is: bkp-name-2017-01-18-22h-00m-50.zip
[18-Jan-2017 22:00:50] 1. Try to backup database …
[18-Jan-2017 22:00:50] Connected to database db-name on localhost
[18-Jan-2017 22:00:50] Added database dump "db-name.sql.gz" with 999,99 KB to backup file list
[18-Jan-2017 22:00:50] Database backup done!
[18-Jan-2017 22:00:50] 1. Trying to make a list of folders to back up …
[18-Jan-2017 22:00:51] Added "name" to backup file list
[18-Jan-2017 22:00:51] 999 folders to backup.
[18-Jan-2017 22:00:51] 1. Trying to create a WordPress export to XML file …
[18-Jan-2017 22:00:51] Check WP Export file …
[18-Jan-2017 22:00:51] WP Export file is a valid WXR file.
[18-Jan-2017 22:00:51] Compressing file …
[18-Jan-2017 22:00:51] Compressing done.
[18-Jan-2017 22:00:51] Added XML export "name.xml.gz" with 99 KB to backup file list.
[18-Jan-2017 22:00:51] 1. Trying to generate a file with installed plugin names …
[18-Jan-2017 22:00:51] Added plugin list file "name.txt.gz" with 999,00 B to backup file list.
[18-Jan-2017 22:00:51] 1. Trying to generate a name file …
[18-Jan-2017 22:00:51] Added name.json file with 9,99 KB to backup file list.
[18-Jan-2017 22:00:51] 1. Trying to create backup archive …
[18-Jan-2017 22:00:51] Compressing files as ZipArchive. Please be patient, this may take a moment.
[18-Jan-2017 22:00:56] Backup archive created.
[18-Jan-2017 22:00:56] Archive size is 99,99 MB.
[18-Jan-2017 22:00:56] 999 Files with 99,9 MB in Archive.
[18-Jan-2017 22:00:57] 1. Try to send backup file to Dropbox …
[18-Jan-2017 22:00:57] Authenticated with Dropbox of user: acount-name
[18-Jan-2017 22:00:57] Uploading to Dropbox …
[18-Jan-2017 22:00:57] ERROR: Dropbox API: (6) Couldn't resolve host 'content.dropboxapi.com'
[18-Jan-2017 22:00:57] 2. Try to send backup file to Dropbox …
[18-Jan-2017 22:00:58] Authenticated with Dropbox of user: acount-name
[18-Jan-2017 22:00:58] Uploading to Dropbox …
[18-Jan-2017 22:00:58] ERROR: Dropbox API: (6) Couldn't resolve host 'content.dropboxapi.com'
[18-Jan-2017 22:00:58] 3. Try to send backup file to Dropbox …
[18-Jan-2017 22:00:58] Authenticated with Dropbox of user: acount-name
[18-Jan-2017 22:00:58] Uploading to Dropbox …
[18-Jan-2017 22:00:58] ERROR: Dropbox API: (6) Couldn't resolve host 'content.dropboxapi.com'
[18-Jan-2017 22:00:58] ERROR: Step aborted: too many attempts!
[18-Jan-2017 22:00:58] 1. Trying to check database …
[18-Jan-2017 22:00:58] Database check done!
[18-Jan-2017 22:00:58] ERROR: Job has ended with errors in 8 seconds. You must resolve the errors for correct execution.