I can’t find the storage place of the masterkey.cryptomator file.
I have shown the window from which the file should be accessible (English version) here, as I find it in my German application.
I cannot find any access here.
I hope someone can help me.
The Warning sign shown for you vault “Crypto SD128” indicates, that this path is not available. Semms like your SD is not connected, or not assigned to drive letter “F”.