Unable to install NodeSnapshot quark: Class 'Material' not found

Hello! I am unable to get the ServerView quark, due to an error within a dependency, the NodeSnapshot quark. I get the warning Class 'Material' not found Is that an unexisting class? I opened the quark code and saw:

	classvar okayIcon, warningIcon, groupColor, groupOutline, font;
	var <view, <viewMap, <viewsInUse, currentSnapshot, collapse=false,
	autoUpdateRoutine, autoUpdate=true, <ignore, lastValidation;

	*initClass {
		groupColor = Color.hsv(0.35, 0.6, 0.5, 0.5);
		groupOutline = Color.grey(1, 0.3);
		okayIcon = Material("check_box", 16, color:Color.hsv(0.35, 0.8, 0.8, 0.5));
		warningIcon = Material("warning", 16, color:Color.hsv(0.0, 0.8, 0.8, 0.5));
		font = Font("M+ 1c", 10, false).freeze;
	}

This must be the source of the error.
Here is the complete error code:

Installing NodeSnapshot
WARNING: IconSet not found
Installing Singleton
Singleton installed
Installing WindowViewRecall
Installing Collapse
Collapse installed
WindowViewRecall installed
Installing Connection
Installing Singleton
Singleton installed
Installing FreeAfter
FreeAfter installed
Connection installed
Adding path: C:\Users\ivanf\AppData\Local\SuperCollider\downloaded-quarks\NodeSnapshot
NodeSnapshot installed
WARNING: IconSet not found
server 'localhost' disconnected shared memory interface
'/quit' message sent to server 'localhost'.
compiling class library...
	Found 853 primitives.
	Compiling directory 'C:\Program Files\SuperCollider-3.13.0\SCClassLibrary'
	Compiling directory 'C:\ProgramData\SuperCollider\Extensions'
	Compiling directory 'C:\Users\ivanf\AppData\Local\SuperCollider\Extensions'
	Compiling directory 'C:\Users\ivanf\AppData\Local\SuperCollider\downloaded-quarks\Collapse'
	Compiling directory 'C:\Users\ivanf\AppData\Local\SuperCollider\downloaded-quarks\FreeAfter'
	Compiling directory 'C:\Users\ivanf\AppData\Local\SuperCollider\downloaded-quarks\Connection'
	Compiling directory 'C:\Users\ivanf\AppData\Local\SuperCollider\downloaded-quarks\WindowViewRecall'
	Compiling directory 'C:\Users\ivanf\AppData\Local\SuperCollider\downloaded-quarks\Singleton'
	Compiling directory 'C:\Users\ivanf\AppData\Local\SuperCollider\downloaded-quarks\WindowHandleView'
	Compiling directory 'C:\Users\ivanf\AppData\Local\SuperCollider\downloaded-quarks\ServerOptionsGui'
	Compiling directory 'C:\Users\ivanf\AppData\Local\SuperCollider\downloaded-quarks\Preference.quark'
	Compiling directory 'C:\Users\ivanf\AppData\Local\SuperCollider\downloaded-quarks\ServerView'
	Compiling directory 'C:\Users\ivanf\AppData\Local\SuperCollider\downloaded-quarks\NodeSnapshot'
	numentries = 1410921 / 21757560 = 0.065
	6220 method selectors, 3498 classes
	method table size 22983632 bytes, big table size 174060480
	Number of Symbols 15838
	Byte Code Size 480912
	compiled 586 files in 0.37 seconds

Info: 5 methods are currently overwritten by extensions. To see which, execute:
MethodOverride.printAll

compile done
localhost : setting clientID to 0.
internal : setting clientID to 0.
Execution warning: Class 'Material' not found
WARNING: keyword arg 'color' not found in call to Object:doesNotUnderstand
ERROR: Message 'new' not understood.
RECEIVER:
   nil
ARGS:
Instance of String {    (0000020E0D8C0C00, gc=01, fmt=07, flg=11, set=02)
  indexed slots [9]
      0 : c
      1 : h
      2 : e
      3 : c
      4 : k
      5 : _
      6 : b
      7 : o
      8 : x
}
   Integer 16
CALL STACK:
	DoesNotUnderstandError:reportError
		arg this = <instance of DoesNotUnderstandError>
	Nil:handleError
		arg this = nil
		arg error = <instance of DoesNotUnderstandError>
	Thread:handleError
		arg this = <instance of Thread>
		arg error = <instance of DoesNotUnderstandError>
	Object:throw
		arg this = <instance of DoesNotUnderstandError>
	Object:doesNotUnderstand
		arg this = nil
		arg selector = 'new'
		arg args = [*2]
	Meta_TreeSnapshotView:initClass
		arg this = <instance of Meta_TreeSnapshotView>
	Meta_Class:initClassTree
		arg this = <instance of Meta_Class>
		arg aClass = <instance of Meta_TreeSnapshotView>
		var implementsInitClass = nil
	ArrayedCollection:do
		arg this = [*5]
		arg function = <instance of Function>
		var i = 1
	Meta_Class:initClassTree
		arg this = <instance of Meta_Class>
		arg aClass = <instance of Meta_Singleton>
		var implementsInitClass = nil
	ArrayedCollection:do
		arg this = [*281]
		arg function = <instance of Function>
		var i = 246
	Meta_Class:initClassTree
		arg this = <instance of Meta_Class>
		arg aClass = <instance of Meta_Object>
		var implementsInitClass = nil
	Process:startup
		arg this = <instance of Main>
		var time = 1443.6614535
	Main:startup
		arg this = <instance of Main>
		var didWarnOverwrite = false
^^ ERROR: Message 'new' not understood.
RECEIVER: nil


ERROR: Message 'at' not understood.
RECEIVER:
   nil
ARGS:
   Integer 3772
CALL STACK:
	DoesNotUnderstandError:reportError
		arg this = <instance of DoesNotUnderstandError>
	Nil:handleError
		arg this = nil
		arg error = <instance of DoesNotUnderstandError>
	Thread:handleError
		arg this = <instance of Thread>
		arg error = <instance of DoesNotUnderstandError>
	Object:throw
		arg this = <instance of DoesNotUnderstandError>
	Object:doesNotUnderstand
		arg this = nil
		arg selector = 'at'
		arg args = [*1]
	Meta_String:doUnixCmdAction
		arg this = <instance of Meta_String>
		arg res = 0
		arg pid = 3772
^^ ERROR: Message 'at' not understood.
RECEIVER: nil

Any help appreciated!