Issue file(): Peer certificate CN=`main serveur URI' did not match expected CN=`hosted domain URI'

[cali]

i have an error when i would use php FTP function with URL FOPEN my system bring me back this error:

file(): Peer certificate CN=`(complete host name set in plesk general setting)' did not match expected CN=`(domain name on witch on i use the function'

i'm using let's encrypt certificates. In plesk, in the domain's SSL section all is green and ok, using my browser when i'm on the domain it's also all ok.

is someone have an idea how i can do ?

 

[mow]

Seems the ftp client or/and the server does not use SNI, so the server presents the default certificate.

 

[cali]

How can i check if my plesk server is using SNI ?