Minecraft Version: 1.15.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_241, Oracle Corporation
ModLauncher: 5.0.0-milestone.4+67+b1a340b
Forge: net.minecraftforge:31.1.27

[Forge Version Check/INFO]: [baubles] Starting version check at http://myurl.me/
[Forge Version Check/WARN]: Failed to process update information
java.io.IOException: Server returned HTTP response code: 400 for URL: http://myurl.me/
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_241]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_241]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_241]
at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_241]
at sun.net.www.protocol.http.HttpURLConnection$10.run(Unknown Source) ~[?:1.8.0_241]
at sun.net.www.protocol.http.HttpURLConnection$10.run(Unknown Source) ~[?:1.8.0_241]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_241]
at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unknown Source) ~[?:1.8.0_241]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source) ~[?:1.8.0_241]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) ~[?:1.8.0_241]
at net.minecraftforge.fml.VersionChecker$1.openUrlStream(VersionChecker.java:189) ~[?:?]
at net.minecraftforge.fml.VersionChecker$1.process(VersionChecker.java:206) ~[?:?]
at java.lang.Iterable.forEach(Unknown Source) [?:1.8.0_241]
at net.minecraftforge.fml.VersionChecker$1.run(VersionChecker.java:157) [?:?]
Caused by: java.io.IOException: Server returned HTTP response code: 400 for URL: http://myurl.me/
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source) ~[?:1.8.0_241]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) ~[?:1.8.0_241]
at java.net.HttpURLConnection.getResponseCode(Unknown Source) ~[?:1.8.0_241]
at net.minecraftforge.fml.VersionChecker$1.openUrlStream(VersionChecker.java:173) ~[?:?]
... 3 more

Thanks for the report. I forget to remove the updateJsonUrl on the .tmol file