SIKOLAG Ci - Web sekolah gratis Codeigniter V.1.1 Responsive (7 Warna) error di ujalankan di hosting

Assalamualaikum Warahmatullahi Wabarakatuh...
Mohon pencerahan website SIKOLAG Ci - Web sekolah gratis Codeigniter V.1.1 Responsive (7 Warna) saya upload di hosting muncul error seperti dibawah ini saat dijalankan di hosting. terima kasih
 
A PHP Error was encountered
Severity: Warning
Message: is_dir(): open_basedir restriction in effect. File(/var/sentora/sessions) is not within the allowed path(s): (/var/sentora/hostdata/pemalangkab/public_html/pemalangkab_pmi_or_id:/var/sentora/temp/:/usr/bin/:/usr/share/pear/:/bin/ping)
Filename: drivers/Session_files_driver.php
Line Number: 115
Backtrace:
File: /var/sentora/hostdata/pemalangkab/public_html/pemalangkab_pmi_or_id/index.php
Line: 294
Function: require_once 
A PHP Error was encountered
Severity: Warning
Message: mkdir(): open_basedir restriction in effect. File(/var/sentora/sessions) is not within the allowed path(s): (/var/sentora/hostdata/pemalangkab/public_html/pemalangkab_pmi_or_id:/var/sentora/temp/:/usr/bin/:/usr/share/pear/:/bin/ping)
Filename: drivers/Session_files_driver.php
Line Number: 117
Backtrace:
File: /var/sentora/hostdata/pemalangkab/public_html/pemalangkab_pmi_or_id/index.php
Line: 294
Function: require_once 
An uncaught Exception was encountered
Type: Exception
Message: Session: Configured save path '/var/sentora/sessions' is not a directory, doesn't exist or cannot be created.
Filename: /var/sentora/hostdata/pemalangkab/public_html/pemalangkab_pmi_or_id/system/libraries/Session/drivers/Session_files_driver.php
Line Number: 119
Backtrace:
File: /var/sentora/hostdata/pemalangkab/public_html/pemalangkab_pmi_or_id/index.php
Line: 294
Function: require_once 
A PHP Error was encountered
Severity: Warning
Message: file_exists(): open_basedir restriction in effect. File(2612fdf2c47801d10f175b2131f7269b972784c6) is not within the allowed path(s): (/var/sentora/hostdata/pemalangkab/public_html/pemalangkab_pmi_or_id:/var/sentora/temp/:/usr/bin/:/usr/share/pear/:/bin/ping)
Filename: drivers/Session_files_driver.php
Line Number: 154
Backtrace:
A PHP Error was encountered
Severity: Warning
Message: fopen(): open_basedir restriction in effect. File(2612fdf2c47801d10f175b2131f7269b972784c6) is not within the allowed path(s): (/var/sentora/hostdata/pemalangkab/public_html/pemalangkab_pmi_or_id:/var/sentora/temp/:/usr/bin/:/usr/share/pear/:/bin/ping)
Filename: drivers/Session_files_driver.php
Line Number: 156
Backtrace:
A PHP Error was encountered
Severity: Warning
Message: fopen(2612fdf2c47801d10f175b2131f7269b972784c6): failed to open stream: Operation not permitted
Filename: drivers/Session_files_driver.php
Line Number: 156
Backtrace:
A PHP Error was encountered
Severity: Warning
Message: Unknown: Failed to write session data (user). Please verify that the current setting of session.save_path is correct (/var/sentora/sessions)
Filename: Unknown
Line Number: 0
Backtrace: