Classic wow cant start

Hello everyone, after a year of break, I decided to play classic a bit. When I press the play button, nothing happened. I tried all the options from this video
https://www.youtube.com/watch?v=wKnxUHrUr1Y&t=212s nothing helped me. While I was thinking about what else I could do, I allowed retail to download and retail works, but I can’t start classic. Does anyone have any suggestions on what else I can do? Ty. Short note, in task manager i can see game is runing but it doesn’t want to launch it

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