Launcher problemsHMCL Crash on Startup: MalformedURLException in Update Checker
What it looks like in the log
java.lang.IllegalArgumentException: java.net.MalformedURLException: no protocol: https%3A%2F%2Fhmcl.huangyuhui.net%2Fapi%2Fupdate_link%3Fversion%3D3.<
How to fix it
- Close HMCL completely.
- Manually download HMCL version 3.2.143 or the latest release from the official HMCL website (hmcl.huangyuhui.net) or the HMCL-dev/HMCL GitHub Releases page.
- Move the newly downloaded HMCL executable or JAR file into your HMCL folder to replace the broken 3.2.140 file, keeping your existing '.hmcl' and '.minecraft' directories intact.
- Launch the updated HMCL file.
| Loaders | Vanilla, Forge, Neoforge, Fabric, Quilt |
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| Severity | Stops the game |
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| Category | Launcher problems |
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Check your own log