PHP 7.2 yum installation on Centos 7 misses libargon2.so
Solution 1:
The package you are missing is named libargon2, and it is in the epel repository. It was previously in remi until it was added to epel, at which point remi removed it from his repo.
In order to use the remi-php72 repo, you must also enable the remi and epel repos, but one or both of these are disabled on your system.
Enable the remi and epel repos and try again.