Can upload .txt and .rar but cant upload .zip or .pdf

update_problems

#1

I have install version 14.0.0 and i can upload .txt and .rar but cant upload .zip or .pdf. Folder ofcourse has the right to upload because i can upload some file type and some not and i have ofcourse allow for uploading all type of files.
When i try to upload pdf example, i see just “upload in second” and nothing more.
this is a bug? solutions please?