GUI impossible with MCreator 2023.3 - Plugin V1.6 - 1.16.5 (2023.3)

Hi there,

I'm working on a 1.16.5 mod and I'm stuck on a problem.

I tried several time to create some GUI without any success with this setup:

• Mcreator 2023.3
• V1.6 - 1.16.5 (2023.3) [Latest for MCreator 2023.3] - generator-1.16.5-1.6-2023.3_0.zip

I followed the "The second most common solution" for 100 error canno't find symbol on the gradle error knowledge base, it doesn't work.

I tried clean install on a different computer, open mcreator and add a basic GUI --> still no luck.

I understand 1.16.5 mod is maybe not anymore a concern, but is there any other configuration I can try to be able to develop my mod?

Thanks in advance for the support.