JNLP wont work with plus sign + in file name

[Tartarga]

OpenWebStart throws File Not Found if a plus sign is in the filename of the JNLP file. Due to reasons beyond my control I cannot provide loGs, nOr am I the able to haVe The developers change things. Once manually removed the program works wonderfully.

Windows 10/11 x64

[Tartarga]

Example, note + is a space on the 2nd part of the error

net.sourceforge.jnlp.LaunchException: Fatal: Read Error: Could not read or parse the JNLP file at 'file:/C:/Users/X/Downloads/launch+2.jnlp'. You can try to download this file manually and send it as bug report to IcedTea-Web team.
at net.sourceforge.jnlp.Launcher.fromUrl(Launcher.java:333)
at net.sourceforge.jnlp.Launcher.launch(Launcher.java:193)
at net.sourceforge.jnlp.runtime.Boot.launch(Boot.java:355)
at net.sourceforge.jnlp.runtime.Boot.run(Boot.java:335)
at net.sourceforge.jnlp.runtime.Boot.run(Boot.java:73)
at java.security.AccessController.doPrivileged(Native Method)
at net.sourceforge.jnlp.runtime.Boot.runMain(Boot.java:279)
at net.sourceforge.jnlp.runtime.Boot.mainWithReturnCode(Boot.java:132)
at net.sourceforge.jnlp.runtime.Boot.main(Boot.java:114)
at com.openwebstart.launcher.PhaseTwoWebStartLauncher.main(PhaseTwoWebStartLauncher.java:93)
at com.openwebstart.launcher.OpenWebStartLauncher.main(OpenWebStartLauncher.java:47)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.exe4j.runtime.LauncherEngine.launch(LauncherEngine.java:84)
at com.exe4j.runtime.WinLauncher.main(WinLauncher.java:94)
at com.install4j.runtime.launcher.WinLauncher.main(WinLauncher.java:25)
Caused by: java.io.FileNotFoundException: C:\Users\X\Downloads\launch 2.jnlp (The system cannot find the file specified)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(FileInputStream.java:195)
at java.io.FileInputStream.(FileInputStream.java:138)