I am dealing with the WebDAV issue in version 1.15.1 on Mac OS 15.4. I did not see an option to upgrade from 1.15.1 within Cryptomator, but did see 1.15.2 posted on the website which promises to resolve that bug.
However, the SHA256 of the download is not matching. I have tried both an app and the Mac terminal to check it . . … I have not seen this before. Is something amiss?
Hey and welcome to the Cryptomator Community 
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Thank you very much for reporting this, we fixed the SHA256 sums of the binaries in this release. The actual values are:
bed4ac7696f685e58564d535af6d2d73b1a809595a19d4784f4c232c23085a84 .\cryptomator-1.15.2-aarch64.AppImage
21c4586179482e09a681d75b681b324698272ac5b961d641e7c105d2afd40db8 .\Cryptomator-1.15.2-arm64.dmg
36cfd2cd906071940e6684af596d8f4ab70a2faa6bd7459f184f99296538558b .\Cryptomator-1.15.2-x64.dmg
3cc0b786fe99923969a03f3829c378db3fe3d284baf90ddc2f15221d08f83f38 .\Cryptomator-1.15.2-x64.exe
d97a3aa93b1a7eebbd1e0918e4a92a584c1adeae382baec98dccf2abfbfce45a .\Cryptomator-1.15.2-x64.msi
221110a08214871b5eab17553279ccce5b1f464ee3a91096dfe025dcbd37f0f5 .\cryptomator-1.15.2-x86_64.AppImage