Possible causes
The Studio’s embedded Marketplace view might rely on a WebView or embedded browser that’s blocked by network/proxy/firewall settings
Some static content (JavaScript, CSS) for the Marketplace might not load correctly when upgrading from Mendix 9 → 10
Studio cache or corrupted local configurations might be interfering
A bug in the version 10.24.3 build (or patch level) causing UI components to fail in that context
🔧 What you can try (in simple steps)
Clear Studio cache / local data
Close Studio Pro
Delete or rename the folder %LOCALAPPDATA%\Mendix\…
or the corresponding path for your OS (where Studio stores local user data)
Relaunch Studio Pro and try the Marketplace again
Some users report this helped. community.mendix.com+1
Check network/proxy/firewall
Ensure that your machine can access https://marketplace.mendix.com/
without restrictions
If you're behind a corporate firewall or proxy, check that the embedded browser in Studio is allowed to load external scripts/resources
Temporarily disable strict blocking or proxy to test if the blank page issue resolves
Update Studio Pro to a newer patch
If you are on 10.24.3, check if there is a 10.24.x patch (10.24.4, 10.24.5, etc) that includes a fix for Marketplace UI issues
The 10.24 release notes mention bug-fixes in later patch versions (10.24.4, 10.24.5) for UI issues. Mendix Documentation
Upgrading to a later patch may resolve the blank page bug
Right-click and reload the Marketplace pane
In Studio Pro, open the Marketplace tab, then right-click the tab header and choose Close Tab (or similar)
Then reopen it (via the shopping-cart icon) to reload the view
One user found this worked for similar blank-pane issues. community.mendix.com
Workaround: import modules manually
If the Marketplace view remains blank, go to https://marketplace.mendix.com/
in an external browser, download the needed module packages (.mpk) manually
Then in Studio Pro: Project → Import Module Package to bring them in
Not ideal long-term but keeps you unblocked. community.mendix.com