Line 11 altitudedigital.com is not the canonical exchange domain. Use altitude-arena.com instead.
Line 12 Ad system domain oath.com is not a known exchange domain. Ensure the spelling is correct, check the partner documentation, or have the partner update the IAB Tech Lab normalization mappings: https://wiki.iabtechlab.com/index.php?title=Ads.txt_Normalization_Mappings
Line 13 brightroll.com is not the canonical exchange domain. Use btrll.com instead.
Line 16 rubicon.com is not the canonical exchange domain. Use rubiconproject.com instead.
Line 24 publishers.teads.tv is not the canonical exchange domain. Use teads.tv instead.
Line 25 publishers.teads.tv is not the canonical exchange domain. Use teads.tv instead.
Line 61 Ad system domain supply.colossusssp.com is not a known exchange domain. Ensure the spelling is correct, check the partner documentation, or have the partner update the IAB Tech Lab normalization mappings: https://wiki.iabtechlab.com/index.php?title=Ads.txt_Normalization_Mappings