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But I have this erorrs, what should i do know?
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You get this error, because the board setup says, that the minimal allowed annular ring width is 3,94 mils. You are using vias, whose annular ring widths are smaller than that. Namely 2,95 mils.
To solve your problem in a meaningful way (instead of ignoring the drc errors), you either have to increase the minimal annular ring width in your board setup or increase the annular ring width of your vias. It depends on the requirements of you board, which of those two options you should choose.
To enter the board setup and change the minimum anullar ring size, I have attached an image below, where you find the setting. I use mm, instead of mils, so don't be confused.