Since Chevereto 2.1 you need the BC Math module to work with Chevereto. A neat standard PHP setup should have this because is a standar way before PHP 5. The only reason for not have this feature is that you compile php with the flag --disable-becmath
As you can read in the server configuration documentation this is a requirement, so it must be on your PHP setup. The only way to enable this is re-compiling PHP with the flag --enable-bcmath but this depends on where you are running PHP: In some cases you only need to run yum but in other scenarios you will need to compile the whole PHP again.
Now, this issue has become very popular this days with people who have VPS or dedicated setups. Mostly because people get a server and they don't know how to do the right server setup.
Please make sure to understand that this is a server requirements error, not a script error. If you have a dedicated you should know how to deal with this things and I encourage those who have problems to ask in the Server configuration and Hosting forum remembering to be kind with those that can help you.
As you can read in the server configuration documentation this is a requirement, so it must be on your PHP setup. The only way to enable this is re-compiling PHP with the flag --enable-bcmath but this depends on where you are running PHP: In some cases you only need to run yum but in other scenarios you will need to compile the whole PHP again.
Now, this issue has become very popular this days with people who have VPS or dedicated setups. Mostly because people get a server and they don't know how to do the right server setup.
Please make sure to understand that this is a server requirements error, not a script error. If you have a dedicated you should know how to deal with this things and I encourage those who have problems to ask in the Server configuration and Hosting forum remembering to be kind with those that can help you.