Now do it right ;-)

gitlab/functions.sh

@@ -264,7 +264,7 @@ dav_upload_folder() {
     # to make something like '../folder1/folder2/folder-to-upload/test.txt'
     # into 'private-upload/docs/test.txt'
     local server_prefix="${2%?}" #without ending slash
-    local server_path="${fname/$1/$2}"
+    local server_path="${fname/$1/$server_prefix}"
 
     # if its a file...
     if [[ -f "${fname}" ]]; then