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