tempnam(): open_basedir restriction in effect – Error

Hi, I am getting below error :-

[Oct 02] tempnam(): open_basedir restriction in effect. File(/tmp) is not within the allowed path(s): (/home/username/example.com/public_html:/home/username/tmp) (2) File: /home/username/example.com/public_html/wp-content/plugins/wordfence/lib/wfConfig.php Line: 356
[Oct 02] fopen(): Filename cannot be empty (2) File: /home/username/example.com/public_html/wp-content/plugins/wordfence/lib/wfConfig.php Line: 357
[Oct 02] fwrite() expects parameter 1 to be resource, boolean given (2) File: /home/username/example.com/public_html/wp-content/plugins/wordfence/lib/wfConfig.php Line: 366
[Oct 02] fwrite() expects parameter 1 to be resource, boolean given (2) File: /home/username/example.com/public_html/wp-content/plugins/wordfence/lib/wfConfig.php Line: 366
[Oct 02] fseek() expects parameter 1 to be resource, boolean given (2) File: /home/username/example.com/public_html/wp-content/plugins/wordfence/lib/wfConfig.php Line: 371
[Oct 02] fread() expects parameter 1 to be resource, boolean given (2) File: /home/username/example.com/public_html/wp-content/plugins/wordfence/lib/wfConfig.php Line: 372
[Oct 02] fclose() expects parameter 1 to be resource, boolean given (2) File: /home/username/example.com/public_html/wp-content/plugins/wordfence/lib/wfConfig.php Line: 373
[Oct 02] unlink(): open_basedir restriction in effect. File() is not within the allowed path(s): (/home/username/example.com/public_html:/home/username/tmp) (2) File: /home/username/example.com/public_html/wp-content/plugins/wordfence/lib/wfConfig.php Line: 374
[Oct 02] Scan can't continue - stored data not found after a fork. Got type: boolean
[Oct 02]  Warning: tempnam(): open_basedir restriction in effect. File(/tmp) is not within the allowed path(s): (/home/username/example.com/public_html:/home/username/tmp) in /home/username/example.com/public_html/wp-content/plugins/wordfence