Fatal error and double slash in dropbox folder

I've installed Snapshot on two of my sites on the same server.

The first is running fine without any issues apart from when I add a WordPress directory it adds a double slash for example website-backups//game-muse.

Is this normal?

Also the main problem is that one of my sites gave me a fatal error when trying to take the snapshot for the first time.

Here's the error -

Fatal error: Allowed memory size of 25165824 bytes exhausted (tried to allocate 122880 bytes) in /home/gamemuse/public_html/gamemuse.net/wp-admin/includes/class-pclzip.php on line 1524

Both sites are on the same VPS server.

Please let me know what additional information you need to help me out with this.