I have a similar issue. I login into my account, navigate to
https://www.native-instruments.com/pages/komplete-kontrol-update?_gl=1%2A7qh78n%2A_gcl_au%2ANTA4MDQxNjUzLjE3OTM5ODk4MDkuNDI0OTE0Mjg4LjE3OTM5OTI1NjAuMTc5Mzk5Mjc5Ni4xMDY5NzM1NjYuMTc5Mzk5MjU2MC4xNzkzOTkyNzk2%2A_ga%2ANjcwNTc1Njk4LjE3OTM5ODk4MDk.%2A_ga_S4HX7NRXLW%2AczE3OTQwMDYxMzUkbzIkZzAkdDE3OTQwMDYxMzUkajYwJGwwJGgxNjc5NzU4Nw..
but when I click on the Download Mac link I get the following:
SignatureDoesNotMatchAccess denied.AWS4-HMAC-SHA256 20261106T230303Z 20261106/auto/storage/aws4_request be26729ad6b3a440a3185de0013055c7863d2ca2dae49ad021b168d5a8ae8616GET /ni-assets/downloads/KSMK3_FW_2.1.4_MAC.zip _gl=1%2Abwnkd2%2A_gcl_au%2ANTA4MDQxNjUzLjE3OTM5ODk4MDkuNDI0OTE0Mjg4LjE3OTM5OTI1NjAuMTc5Mzk5Mjc5Ni4xMDY5NzM1NjYuMTc5Mzk5MjU2MC4xNzkzOTkyNzk2%2A_ga%2ANjcwNTc1Njk4LjE3OTM5ODk4MDk.%2A_ga_S4HX7NRXLW%2AczE3OTQwMDYxMzUkbzIkZzEkdDE3OTQwMDYxNzUkajIwJGwxJGgxNjc5NzU4Nw.. host:storage.googleapis.com x-amz-content-sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 x-amz-date:20261106T230303Z host;x-amz-content-sha256;x-amz-date e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855