Mcrypt missing in php installation
Mcrypt is a modern encryption library. It replaces the Unix file encryption tool with an algorithm similar to the WWII Enigma code. Mcrypt provides the same functionality, but with modern block algorithms such as DES, TripleDES, and Blowfish.
To perform some of its internal functions, the All-in-One WP Migration Mega Extension requires installation of the Mcrypt module.
If you see this message, your server does not have the Mcrypt module installed. Please contact your hosting provider to have the Mcrypt module installed in order to run the All-in-One WP Migration Mega Extension, or consider using a different cloud hosting provider.