Google translation: "Failed to import .tif and psd files Unknown error (55). Trying to import a series of files from a hard disk to the collection, or some Lightroom folder shows me the following window."
Upload one of the .psd or .tif files to Dropbox or similar and post the sharing link here. We can see if the problem is with the file itself or your LR installation.
On Mac, file names at the app level (e.g. Finder) are allowed to contain "/", and at the operating-system level the "/" characters are replaced by ":". But LR doesn't correctly implement that behavior, and if you try to import the file named "a/b.jpg", you'll get "Unknown error", with the error window showing "a:b.jpg". The option Replace Illegal File Name Characters With: Dashes doesn't work with Import.
I think the only workaround is to rename the files to not contain "/".