Graphics and Chat Thread problems

I cannot use some functions of the chat in Zoom app:

- All graphs or gifs sent to me are not displayed (there is a grey square with an exclamation mark inside the triangle) 

- I cannot send any files or graphs or gifs as well (when trying to send a file to a colleague of mine, there is an error: Your account admin has placed restrictions on sending ...)

- I cannot display any thread replies - there is an info there has been a reply but when I click on the arrow down to display the thread on the chat, it does not work

Has anyone had similar problems to mine? Any ideas how to solve that, please? 

My Zoom account has been checked on different computers, of course.