Hi @konstantinos.karamfylidis ,
I hope you're doing well. There are several batch file tags that could be tried, could you confirm which ones you used? Here are the most important ones, copied from the README file that comes with EAGLE.
"
Intel HD Graphics 4000, Intel HD Graphics 530 and few others graphics cards are knows to cause WebGL errors.
EAGLE uses WebGL for the package generator available in the library and device editors.
There are two workarounds:
1) In some cases disabling framebuffer multisampling could help workaround the issue and keep using hardware OpenGL:
cd "c:\EAGLE x.x.x"
set QTWEBENGINE_CHROMIUM_FLAGS=–disable_chromium_framebuffer_multisample
eagle.exe
2) If (1) doesn't work use software OpenGL mode by running eagle_SW_OpenGL.bat script instead of eagle.exe
-- Various WebEngine errors
EAGLE passes '--ignore-gpu-blacklist' to Chromium by default.
This enables WebGL even on graphics cards / drivers that are known to have problems with it.
If you encounter issues with HTML content including bugs in WebGL then set QTWEBENGINE_CHROMIUM_FLAGS environment variable to “--ignore-gpu-blacklist=false” and run EAGLE:
cd "c:\EAGLE x.x.x"
set QTWEBENGINE_CHROMIUM_FLAGS=--ignore-gpu-blacklist=false
eagle.exe
"
Another thing you can try is updating your drivers.
Even though the parts get rendered as a wireframe, you can still work with them that way.
Let me know if there's anything else I can do for you.
Best REgards,

Jorge Garcia
Product Support Specialist for Fusion 360 and EAGLE
Kudos are much appreciated if the information I have shared is helpful to you and/or others.
Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.