The "install" button does not working

[BSD-shnik]

Hi to community.
Prestashop 1.6.1.6

Got some strange problem with an installation of modules. The "install" button does not working in all not installed modules. It coming nothing for press... the page without some changes.   The errors representation is "on" - returns nothing.  A cache cleaning no changing nothing. What direction for debug?

The  configuration page  has not any errors. Can it be by the wrong php extensions?

 

Installed extensions are:

 CTYPE=on: ctype functions
     CURL=on: CURL support
     DOM=on: DOM support
     FILTER=on: input filter support
     GD=on: GD library support
     HASH=on: HASH Message Digest Framework
     ICONV=on: iconv support
     JSON=on: JavaScript Object Serialization support
     OPCACHE=on: OPcache support
     PDF=on: PDFlib support (implies GD)
     PDO=on: PHP Data Objects Interface (PDO)
     PDO_SQLITE=on: PDO sqlite driver
     PHAR=on: phar support
     SESSION=on: session support
     SIMPLEXML=on: simplexml support
     SOAP=on: SOAP support
     SQLITE3=on: sqlite3 support
     TOKENIZER=on: tokenizer support
     XML=on: XML support
     XMLREADER=on: XMLReader support

Please help me for debug it.....

Edited September 30, 2016 by BSD-shnik (see edit history)

[puser99]

i have the same problem. I can upload modules, but even the pre-installed ones do not "install".

 

I click the install button but it doesn't even show process activity, or acknowledgement of the button press.

 

I have 1.6.1.5 installed, and the install buttons did work at one time.