No option to correct IMAP settings in PS.

[tubeman]

Hi all,
 

After changing the IMAP settings - see empty screenshot in attachment - in the PrestaShop (V1.6.1.12) back office I'm getting: 502 Bad Gateway The server returned an invalid or incomplete response after clicking on View all messages. The thing is, you can't go back to edit this. See also threat https://www.prestashop.com/forums/topic/607553-502-bad-gateway-the-server-returned-an-invalid-or-incomplete-response/

 

Does anyone know a solution for this?

 

Many thanks in advance,

 

Tubeman.