1/4 Penning weighs on average 0.01-0.07. I think it's a mistake everywhere.
https://auksjon.oslomyntgalleri.no/Event/LotDetails/12746269/Brakteat-med-patriarkalkors-014-g
Even the weight of this 1/4 Penning on the website is 0.014 grams, and if you follow the link to the auction, it actually weighs 0.14 - that is, as expected.
Although the norm should be different The Scandinavian denarius was first introduced in Denmark according to the English model under Svend II and Knut I. Initially, it was 1/192 of the weight grade of silver (weighing about 210 grams) and, therefore, contained about 1.09 grams of silver. But sometimes its weight reached 1.3 or even 2 g. Danish pennings were first minted from 937.5 silver. In Norway and Sweden, they were produced according to the same type as in Denmark. Soon they became low-grade, and their weight dropped below 1 g. In the 12th-13th centuries, thin one-sided bracteates began to be produced. In Norway, such silver coins began to be minted under King Olaf Tryggvason in 995 in the following variants: 2 pfennig, 1 pfenning, 1/2 spinning and 1/4 penning and were the main monetary unit until the conclusion of the Kalmar Union in 1387.
https://www.dokpro.uio.no/umk/nominal/penning.html