@Admin
Yes, MonstaFTP Is outdated, see the below callback made throughout the MFTP Session;
https://monstaftp.com/_callbacks/latest-version.php?v=2.9.1&r=https://filemanager.ai/new/&os=Linux&e=e&fp=ef6086cabf5043e1b0494fb2a1c61807 (301 error - moved)
Indicating that the FTP Server is version 2.9.1, however if you follow the url, it tells you how the latest version is 2.10.1, which has many bug fixes and adds a right click function to create zip archive,
Of which our MFTP doesn’t, and many new features are not available on our ftp;
https://www.monstaftp.com/notes/
However my MonstaFTP Makes a similar call back, but the url is;
https://monstaftp.com/_callbacks/latest-version.php?v=2.10.1&r=https://www.hn.fyi/mftp/&os=Linux&e=s&fp=fec9d5f7a90449feb91f395dc5bddf28
ALong with the fact that on my MonstaFTP i can create zip archives from the right click menu, however filemanager.ai cannot, meaning mine is version 2.10.1 (With the Archive update), the latest, however InfinityFree’s is not!
Note the ?v= in the URL standing for version, then the OS and token
Hence MFTP is about 3 versions behind the current!
Following @MAHOfficial issue with unziping and ziping files, that is fixed in the 2.10.1 update 
However The mftp.infinityfree.net is actually up-to-date, with the following callback; https://monstaftp.com/_callbacks/latest-version.php?v=2.10.1&r=http://mftp.infinityfree.net/&os=Linux&e=p&fp=327ed2739b224ed583592dd8ebc6ced0
Showing ?v-2.10.1, indicating that mftp.infinityfree.net is the newest, compared to the Vpanel manager, as exolained above.