That is because that ABR was made with a Photoshop version above CS6. To make it usable as brush tips in Krita, you need to convert it first using a program called abrMate. Then, after importing that converted ABR you can see its brush tips in Krita’s brush editor, in the brush tips tab or alternatively in the Manage Resources... dialog of Krita that you reach via Settings > Manage Resources..., there you need to select Brush Tips in the first drop-down menu and in the second drop-down menu you have to select the imported ABR file you converted before, it will usually be the last file in that list, if you did not import other bundles, ABRs, or ASLs in between.
The brush tips you will get from the converted bundle are these:
You will find them in the locations I described above. To make brushes of them you need tons of work. It would be far easier to use Krita’s own brushes, they are made for Krita and optimized for Krita.
But with these brush set from MB you have a little luck in which I’m involved a lot, there exists exactly this MB brush pack ready converted, set up and tested for Krita here in the forum. In that topic which originally was created from @sadinwilfbin who initially converted that set from PS to Krita, and because MB repeatedly exchanges the ABRs at cubebrush.co with updated versions, @sadinwilfbin’s version no longer worked because the updated versions mix the ranks of the contained brush tips. If you want to know what I have to with that bundle, you have to read up the whole story here:
If you download the bundle from there or use my link below is up to you, the content is identical:
And there exists another bundle for Krita that is based upon PS brushes, it is Odzuki’s stroke of genious about which the topic is found here (the download-link offered by Odzuki is defunct, I was asked to take over the further hosting of it):
Links to download the bundle are found in the second posting or here:
If you want to try your luck with the experimental scripts to convert PS ABRs to Krita KPPs or BUNDLES is up to you, here you find their topics:
All-in-All it is a bad idea trying to convert ABRs for the use in Krita. You have to invest a huge amount of time and work to make them behave similar.
It is like converting the windshield wipers of one car to those of a different manufacturer click-on system, it will work somehow, but they are not made for another car and achieve suboptimal results.
Michelist