HerokuShaders compiling but not executing

On OpenFl 8.9.1, lime 7.5.0, hxcpp 4.0.19, Haxe 3.4.7.
After openfl create HerokuShaders and trying to compile, on execution it throws " [lime.app.Preloader] ERROR: There is no asset library with an ID of "default""
Should I be compiling with some other versions instead ?

Edit 1:
Installed Haxe rc 4.0.0 rc3+e3df7a448
Trying both hxcpp 4.0.19 and hxcpp 4.0.8 throws;
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/_internal/unifill/Unifill.hx:27: characters 41-50 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/_internal/unifill/Unifill.hx:27: characters 41-61 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/_internal/unifill/Unifill.hx:40: characters 15-24 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/_internal/unifill/Unifill.hx:40: characters 15-35 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/_internal/unifill/Unifill.hx:52: characters 15-36 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/text/UTF8String.hx:36: characters 10-38 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/text/UTF8String.hx:51: characters 10-42 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/text/UTF8String.hx:162: characters 10-14 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/text/UTF8String.hx:162: characters 10-18 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/text/UTF8String.hx:199: characters 11-21 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/text/UTF8String.hx:208: characters 6-15 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/text/UTF8String.hx:212: characters 4-13 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/text/UTF8String.hx:215: characters 10-20 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/text/UTF8String.hx:259: characters 11-21 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/text/UTF8String.hx:268: characters 6-15 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/text/UTF8String.hx:272: characters 4-13 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
C:/HaxeToolkit/haxe/lib/lime/7,5,0/src/lime/text/UTF8String.hx:275: characters 10-20 : Warning : haxe.Utf8 is deprecated. Use UnicodeString instead.
c:\haxetoolkit\haxe\lib\hxcpp\4,0,8\include\hxString.h(19): note: see declaration of ‘String’

Thoughts ?

See https://github.com/openfl/lime/issues/1331 - those Haxe and hxcpp versions are incompatible. You could update Haxe, downgrade hxcpp, or update to hxcpp from GitHub.

Hi.
I updated to haxe 4 rc 3 like that thread says and got hit with what is in Edit 1 on my previous post.
Both hxcpp 4.0.19 and 4.0.8 throw the same thing out.
For starters haxe 3.4.7 and hxcpp 4.0.8 also didn’t work.
So by your reply I seem to only be missing an hxcpp git update, will report back.

Ah, I was purely talking about the There is no asset library with an ID of "default" error. The Utf8 deprecation warnings can safely be ignored, or silenced with -D no-deprecation-warnings.

@Gama11 hxcpp dev fixes it, thanks!

Note that the latest lime and openfl Haxelib releases also take care of the Utf8 deprectation warnings.

This problem also occurred after I updated Lime 6.4.0. The solution is as follows:

Versions:
openfl:8.9.2
lime:7.6.0
hxcpp:4.0.19
haxe:4.0.rc3