Error message

• Warning: Illegal string offset 'ID' in cssmgr->MergeCSS() (line 1136 of /home/issar-arhive/htdocs/arhive.issar.com.ua/web/sites/all/libraries/mpdf/classes/cssmgr.php).
• Warning: Cannot assign an empty string to a string offset in cssmgr->MergeCSS() (line 1136 of /home/issar-arhive/htdocs/arhive.issar.com.ua/web/sites/all/libraries/mpdf/classes/cssmgr.php).
• Warning: Illegal string offset 'LANG' in cssmgr->MergeCSS() (line 1139 of /home/issar-arhive/htdocs/arhive.issar.com.ua/web/sites/all/libraries/mpdf/classes/cssmgr.php).
• Warning: Cannot assign an empty string to a string offset in cssmgr->MergeCSS() (line 1139 of /home/issar-arhive/htdocs/arhive.issar.com.ua/web/sites/all/libraries/mpdf/classes/cssmgr.php).
• Warning: Illegal string offset 'ID' in cssmgr->MergeCSS() (line 1190 of /home/issar-arhive/htdocs/arhive.issar.com.ua/web/sites/all/libraries/mpdf/classes/cssmgr.php).
• Warning: Illegal string offset 'LANG' in cssmgr->MergeCSS() (line 1190 of /home/issar-arhive/htdocs/arhive.issar.com.ua/web/sites/all/libraries/mpdf/classes/cssmgr.php).
• Warning: count(): Parameter must be an array or an object that implements Countable in otl->trimOTLdata() (line 5377 of /home/issar-arhive/htdocs/arhive.issar.com.ua/web/sites/all/libraries/mpdf/classes/otl.php).
• Deprecated function: The each() function is deprecated. This message will be suppressed on further calls in mPDF->_putimages() (line 9665 of /home/issar-arhive/htdocs/arhive.issar.com.ua/web/sites/all/libraries/mpdf/mpdf.php).