While uploading files on interspire in Centos server. You may encounter below erorr in httpd error log:
PHP Fatal error: Call to undefined function mb_strtolower()
This is because of the reason that bmstring package is not installed in centos.
To fix this we need to install mbstring by below command:
yum install php-mbstring
Now restart httpd service:
This is all. You would get happy interspire email marketer server now.