[Fri May 12 14:18:05 2017] [error] [client 91.185.100.42] PHP Warning:  assert(): Assertion failed in /var/sentora/hostdata/zadmin/public_html/pages/submission/SubmissionHandler.inc.php on line 52, referer: https://izdanja.smeits.rs/index.php/ptk/workflow/index/2516/5
[Fri May 12 14:18:06 2017] [error] [client 91.185.100.42] PHP Warning:  assert(): Assertion failed in /var/sentora/hostdata/zadmin/public_html/pages/submission/SubmissionHandler.inc.php on line 52, referer: https://izdanja.smeits.rs/index.php/ptk/workflow/index/2516/5
[Fri May 12 14:18:41 2017] [error] [client 91.185.100.42] PHP Warning:  assert(): Assertion failed in /var/sentora/hostdata/zadmin/public_html/pages/submission/SubmissionHandler.inc.php on line 52, referer: https://izdanja.smeits.rs/index.php/ptk/workflow/index/2516/5
[Fri May 12 14:18:41 2017] [error] [client 91.185.100.42] PHP Warning:  assert(): Assertion failed in /var/sentora/hostdata/zadmin/public_html/pages/submission/SubmissionHandler.inc.php on line 52, referer: https://izdanja.smeits.rs/index.php/ptk/workflow/index/2516/5
[Fri May 12 14:20:21 2017] [error] [client 91.185.100.42] PHP Notice:  Undefined index: en_US in /var/sentora/hostdata/zadmin/public_html/lib/pkp/controllers/grid/settings/submissionChecklist/SubmissionChecklistGridHandler.inc.php on line 99, referer: https://izdanja.smeits.rs/index.php/ptk/management/settings/publication