After I realized a persistent error message, I searched for it and found the exact problem on someone else's identical system (both XPS 15s with Ubuntu 20.04). One of the answers wrote "solved:" and suggested a solution, but it did not work for me so I wrote about it. I just came back to check if there are any new solutions, but to my surprise, the answer was deleted by Ravexina. I would just like to know why.
I don't have enough rep to see your deleted answer. But based on your description in this meta post, it seems your answer wasn't an answer at all. But it's a follow-up question.
If that was the case, it was rightfully deleted and what you should do instead is create a new question. You can link to that question in your new post and mention what you tried and what didn't work for you.