Maybe it has updates but continues to report old version.

Several servers all the same failure.
 

All file date remain old Jul 10  not Sep 30 the date of update.

drwxr-xr-x  6 www-data www-data  4096 Jul 10 07:39 .
drwxr-xr-x  5 www-data www-data  4096 Jul 10 07:51 ..
-rw-r--r--  1 www-data www-data    80 Jul 10 07:39 Addon.ini
drwxr-xr-x  4 www-data www-data  4096 Jul 10 07:39 addons
drwxr-xr-x 13 www-data www-data  4096 Sep 30 00:31 data
-rw-r--r--  1 www-data www-data   125 Jul 10 07:39 .editorconfig
-rw-r--r--  1 www-data www-data  4173 Jul 10 07:39 gpconfig.php
-rw-r--r--  1 www-data www-data 18092 Jul 10 07:39 gpl.txt
-rw-rw-rw-  1 www-data www-data    99 Jul 10 07:42 .htaccess
drwxr-xr-x 12 www-data www-data  4096 Jul 10 07:39 include
-rw-r--r--  1 www-data www-data   611 Jul 10 07:39 index.php
-rw-r--r--  1 www-data www-data  2287 Jul 10 07:39 README.md
-rw-r--r--  1 www-data www-data    23 Jul 10 07:39 robots.txt
drwxr-xr-x  5 www-data www-data  4096 Jul 10 07:39 themes
-rw-r--r--  1 www-data www-data    72 Jul 10 07:39 web.config

We have error in TS 5.0.3 update code. So try to manually overwrite /include dir via ftp

We have error in TS 5.0.3 update code.

True, here is a more detailed explanation how to fix it or update manually.