When I am trying to import the module through import module from server, I am getting below error.

Error uploading the module alkacon-oamp-branch_9_0_x.zip.
Manifest file missing in module C:\apache-tomcat-7.0.62\webapps\opencms\WEB-INF\packages\modules\alkacon-oamp-branch_9_0_x.zip.

Please help if anyone have idea?