Unable to upload attachment

Unable to upload attachments in xwiki .
Backend is mysql
Xwiki version : XWiki Enterprise 8.4.3
Uploaded screen shot .

Tomcat logs :

103.205.152.154 - - [28/Feb/2018:10:44:59 +0000] "GET /xwiki/wiki/itrams/get/TourCode/TourJson?xpage=plain&outputSyntax=plain&tourDoc=XWiki.WebHome HTTP/1.1" 200 12
103.205.152.154 - - [28/Feb/2018:10:44:59 +0000] "GET /xwiki/wiki/itrams/get/XWiki/WebHome?outputSyntax=plain&sheet=XWiki.DocumentTree&root=document%3Aitrams%3AXWiki.WebHome&showAttachments=false&showRoot=true&showTranslations=false&root=document%3Aitrams%3AXWiki.WebHome&showRoot=true&data=children&id=%23 HTTP/1.1" 200 459
103.205.152.154 - - [28/Feb/2018:10:44:59 +0000] "GET /xwiki/wiki/itrams/get/XWiki/WebHome?outputSyntax=plain&sheet=XWiki.DocumentTree&showAttachments=false&showTranslations=false&&data=children&id=%23 HTTP/1.1" 200 3916
103.205.152.154 - - [28/Feb/2018:10:44:59 +0000] "GET /xwiki/wiki/itrams/get/XWiki/WebHome?outputSyntax=plain&sheet=XWiki.DocumentTree&showAttachments=false&showTranslations=false&&data=children&id=document%3Aitrams%3AXWiki.WebHome HTTP/1.1" 200 1000
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configuration details added

xwiki.cfg
-----------

xwiki.store.attachment.hint = file
xwiki.store.attachment.versioning.hint = file
xwiki.store.attachment.recyclebin.content.hint=file
xwiki.store.attachment.recyclebin.hint = file
xwiki.store.recyclebin.content.hint = file

xwiki.properties
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environment.permanentDirectory=/var/local/xwiki/