Plesk can't upgrade 12.0.18 - http_error

[Robert_Poehler]

I can't upgrade plesk. The upgrade always stops at the same point:

File downloading PSA_12.0.18/microupdates/MU12/common/_usr_local_psa_PMM_agents_PleskX_PleskX.pm: 14%..20%..34%..42%..50%..66%..71%..82%..95%..100% was finished.
File downloading PSA_12.0.18/microupdates/MU12/rpm-CentOS-6-i386/_usr_local_psa_admin_sbin_pmm-ras: 10%..20%..30%..40%..50%..60%..70%..80%..90%..100% was finished.
File downloading PSA_12.0.18/microupdates/MU12/common/_usr_local_psa_admin_application_smb_controllers_AppController.php: Error: couldn't connect to host, retry...
Error: couldn't connect to host, retry...
Error: couldn't connect to host, retry...
Error: couldn't connect to host, retry...
Error: couldn't connect to host, retry...
Error: couldn't connect to host, retry...
terminate called after throwing an instance of 'http_error'

Full logfile attached to post.

Thanks for any hints.

 

[Robert_Poehler]

Seems it was blocked by IDS on Firewall. Moved Plesk into open zone for update and it worked well.