WordPress Cant figure out this error

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Cant figure out this error, by antsup

I get this funny error as clic on admin link. Cant figure out what I missed?

Fatal error: Uncaught Error: Call to undefined function gzinflate() in /srv/www/htdocs/virtualhosts/files.antsuntupa.fi/jarmo/wp-includes/class-requests.php:947 Stack trace: #0 /srv/www/htdocs/virtualhosts/files.antsuntupa.fi/jarmo/wp-includes/class-requests.php(886): Requests::compatible_gzinflate('\x8DP\xCD\n\xC20\f~\x97\x9D\xA5\xDD\x10\xD1\xED...') #1 /srv/www/htdocs/virtualhosts/files.antsuntupa.fi/jarmo/wp-includes/class-requests.php(835): Requests::compatible_gzinflate('\x1F\x8B\x08\x00\x00\x00\x00\x00\x00\x03\x8DP\xCD\n\xC2...') #2 /srv/www/htdocs/virtualhosts/files.antsuntupa.fi/jarmo/wp-includes/class-requests.php(675): Requests::decompress('\x1F\x8B\x08\x00\x00\x00\x00\x00\x00\x03\x8DP\xCD\n\xC2...') #3 /srv/www/htdocs/virtualhosts/files.antsuntupa.fi/jarmo/wp-includes/class-requests.php(383): Requests:arse_response(Array, 'http://api.word...', Array, Array, Array) #4 /srv/www/htdocs/virtualhosts/files.antsuntupa.fi/jarmo/wp-includes/class-http.php(371): Requests::request('http://api.word...', Array, Array, 'P in /srv/www/htdocs/virtualhosts/files.antsuntupa.fi/jarmo/wp-includes/class-requests.php on line 947

Any help appriciated

Cant figure out this error