Problem

Clicking the Install button in File | Settings | Plugins | Marketplace produces no response: no spinner appears and no download starts. This happens while the right-hand details panel is still loading, or when the plugin metadata request to plugins.jetbrains.com fails or times out.

The IDE log shows:

MarketplaceRequests - Error reading Marketplace file: java.net.SocketException: Connection reset (URL=https://plugins.jetbrains.com/files/9525/603167/meta.json)

Cause

The IDE fetches plugin metadata from plugins.jetbrains.com before processing the Install button click. When this request fails (for example, a proxy routing the domain to a slow or distant endpoint), the install action is silently dropped with no error or progress indicator.

Resolution

1. Open File | Settings | Appearance & Behavior | System Settings | HTTP Proxy.
2. Check whether plugins.jetbrains.com is routed through a proxy.
3. If so, add a filtering rule to exclude plugins.jetbrains.com from proxy routing and configure a direct connection.
4. Retry the installation.

If the proxy cannot be bypassed, switch to a network where plugins.jetbrains.com is directly accessible.

Ref

Plugins | Marketplace: "Install" button doesn't work, plugins are not installed