2 The file url is mention, in which you will need to add the code.
source | link

The Flash uploader has been replaced with a JS one. You only need to make sure you haven't missed the /js folder in the upgrade, and add this to your layout file

Layout file url :/app/design/adminhtml/default/default/layout/aijko/widgetimagechooser.xml

    <reference name="head">
            <action method="addJs"><file>lib/uploader/flow.min.js</file></action>
            <action method="addJs"><file>lib/uploader/fusty-flow.js</file></action>
            <action method="addJs"><file>lib/uploader/fusty-flow-factory.js</file></action>
            <action method="addJs"><file>mage/adminhtml/uploader/instance.js</file></action>
</reference>

The Flash uploader has been replaced with a JS one. You only need to make sure you haven't missed the /js folder in the upgrade, and add this to your layout file:

    <reference name="head">
            <action method="addJs"><file>lib/uploader/flow.min.js</file></action>
            <action method="addJs"><file>lib/uploader/fusty-flow.js</file></action>
            <action method="addJs"><file>lib/uploader/fusty-flow-factory.js</file></action>
            <action method="addJs"><file>mage/adminhtml/uploader/instance.js</file></action>
</reference>

The Flash uploader has been replaced with a JS one. You only need to make sure you haven't missed the /js folder in the upgrade, and add this to your layout file

Layout file url :/app/design/adminhtml/default/default/layout/aijko/widgetimagechooser.xml

    <reference name="head">
            <action method="addJs"><file>lib/uploader/flow.min.js</file></action>
            <action method="addJs"><file>lib/uploader/fusty-flow.js</file></action>
            <action method="addJs"><file>lib/uploader/fusty-flow-factory.js</file></action>
            <action method="addJs"><file>mage/adminhtml/uploader/instance.js</file></action>
</reference>
1
source | link

The Flash uploader has been replaced with a JS one. You only need to make sure you haven't missed the /js folder in the upgrade, and add this to your layout file:

    <reference name="head">
            <action method="addJs"><file>lib/uploader/flow.min.js</file></action>
            <action method="addJs"><file>lib/uploader/fusty-flow.js</file></action>
            <action method="addJs"><file>lib/uploader/fusty-flow-factory.js</file></action>
            <action method="addJs"><file>mage/adminhtml/uploader/instance.js</file></action>
</reference>