Cannot update plugins via WPMU DEV Dashboard plugin

Cannot update plugins via WPMU DEV Dashboard, however can update plugins via the Hub.

Getting following Debug log error:

[Fri Apr 21 08:31:33.560349 2017] [core:error] [pid 10868:tid 139886724105984] [client 141.237.108.162:51720] Script timed out before returning headers: update-core.php, referer: http://xxx/wp-admin/admin.php?page=wpmudev-support
[Fri Apr 21 08:25:48.224762 2017] [core:error] [pid 11346:tid 139886573037312] [client 31.207.107.223:53465] Script timed out before returning headers: index.php, referer: http://xxx/wp-admin/admin.php?page=wpmudev-support
[Fri Apr 21 08:25:46.192244 2017] [core:error] [pid 27500:tid 139886740891392] [client 31.207.107.223:53464] Script timed out before returning headers: index.php, referer: http://hofer-sued.tirol/wp-admin/admin.php?page=wpmudev-support
[Fri Apr 21 08:25:36.208581 2017] [core:error] [pid 13035:tid 139886698927872] [client 31.207.107.223:53463] Script timed out before returning headers: admin.php, referer: http://xxxl/wp-admin/admin.php?page=wpmudev-support
[Fri Apr 21 08:23:12.452244 2017] [core:error] [pid 12620:tid 139886724105984] [client 31.207.107.223:53340] Script timed out before returning headers: plugins.php, referer: http://xxx/wp-admin/admin.php?page=wpmudev-support
[Fri Apr 21 08:17:54.602455 2017] [core:error] [pid 27689:tid 139886648571648] [client 31.207.107.223:53271] Script timed out before returning headers: admin-ajax.php, referer: http://xxx/wp-admin/admin.php?page=wpmudev-plugins

Performed plugin conflict test, still the same issue. FTP/dash access available chat.