Plugin s2Members doesn't compare

Hi!
I uploaded several times the plugin on my server but when I try to activate it, doesn’t compare under plugins list. If I try with the s2Member Server Scan.php i have this error:

Warning[WARNING] Plugin Directory Checksum (s2member)dismiss?
Although NOT required, s2Member recommends that you reinstall the following plugin directory: /home/yerbnedu/public_html/wp-content/plugins/s2member. The checksum for this plugin directory (dbd46ba5bfd6080398a0e59798c7cb7b), does NOT match up with the official release of this plugin (dcd346ee3120bceb8a2baf42bb6a94de). An invalid checksum can be caused by an incomplete set of files. Or, by files that should NOT appear in this directory. Or, by corrupted files in this directory. Reinstalling the official release of this plugin should correct this issue.

If all else fails, please check your method of upload. We recommend FTP via FileZilla™. Also, please be sure the following file extensions are uploaded in ASCII mode (php, html, xml, txt, css, js, ini, pot, po, sql, svg). All other files should be uploaded in BINARY mode. Some FTP applications (like FileZilla™), can be configured to automatically recognize file extensions that should be uploaded in ASCII mode, while all others will be uploaded in BINARY mode by default. With this type of configuration, use upload mode AUTO.

This issue is just unbelievable. I never had a similar issue.

Best regards
David

https://wordpress.org/plugins/s2member/