Matlab gives "ContributedToolsLoader" error

Whenever I try to open Matlab, it throws error as below. I just downloaded the app, and try to open a m file.

Also, I added screnshot as well.

PC is Macbook Pro Catalina version 10.15

Exception in thread "ContributedToolsLoader": java.lang.NoClassDefFoundError: Could not initialize class java.nio.file.FileSystems$DefaultFileSystemHolder
	at java.nio.file.FileSystems.getDefault(FileSystems.java:176)
	at java.io.File.toPath(File.java:2234)
	at com.mathworks.resources_folder.ResourcesFolderUtils.getResourcesFolderName(ResourcesFolderUtils.java:31)
	at com.mathworks.mde.desk.ContributedTools.constructToolSetFileName(ContributedTools.java:103)
	at com.mathworks.mde.desk.ContributedTools.<init>(ContributedTools.java:65)
	at com.mathworks.mde.desk.ContributedToolsLoader$3.run(ContributedToolsLoader.java:69)
	at java.lang.Thread.run(Thread.java:748)
Exception in thread "Startup Class Loader": java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.instutil.InstutilResourceKeys
	at com.mathworks.mlwidgets.help.DocCenterRoot.initDocRelease(DocCenterRoot.java:44)
	at com.mathworks.mlwidgets.help.DocCenterRoot.<clinit>(DocCenterRoot.java:26)
	at com.mathworks.mlwidgets.help.HelpPrefs.<clinit>(HelpPrefs.java:57)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:264)
	at com.mathworks.mlservices.MLHelpServices.getDocRoot(MLHelpServices.java:522)
	at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.getDocrootDirectory(ProductInfoUtils.java:707)
	at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.getAbsolutePath(ProductInfoUtils.java:694)
	at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.parseFile(ProductInfoUtils.java:259)
	at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.parseFiles(ProductInfoUtils.java:319)
	at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.pathChanged(ProductInfoUtils.java:154)
	at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.<init>(ProductInfoUtils.java:80)
	at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.getAllProductsInfo(ProductInfoUtils.java:900)
	at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.<clinit>(ProductInfoUtils.java:66)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:264)
	at com.mathworks.mde.desk.StartupClassLoader$LoadInfo.<init>(StartupClassLoader.java:112)
	at com.mathworks.mde.desk.StartupClassLoader.createLoadInfos(StartupClassLoader.java:202)
	at com.mathworks.mde.desk.StartupClassLoader.access$500(StartupClassLoader.java:25)
	at com.mathworks.mde.desk.StartupClassLoader$2.run(StartupClassLoader.java:223)
	at java.lang.Thread.run(Thread.java:748)

Answer 1

[Prabhanjan Mentla]

Hi,

MATLAB is compatible with Catalina version 10.15 from release R2019b onwards. This link may help you to understand system requirements and this to resolve specific error.

Hope this helps.

Answer 2

[Jonathan Weaver]

I have the same error. It just started - I've been running 2020b for some time with no issue! Tried remove/reinstall but the issue is still there.

[Thomas Montenegro-Johnson]

Exactly the same with me - very frustrating when you only get about an hour a week to do actual research!

[Stanislas Dumas]

I got the exact same prblem starting today, still works fine on an old computer, was working fine today until it broke all of a sudden (I didn't update or change anything)

[Loic Daridon]

I have the same pb since yesterday. matlab worked last week and know I have this error. I do not have made update of my IOS 13.66. any idea how to fix it I get matlab R2019b

thks