Unable to install the Collabora Online - Built-in CODE Server

If I try to install the server I get an error message: “An error occured during the request. Unable to proceed.”
I found some posts about this problem but no solution. My ISP does not allow me to try command line commands like occ…
Does someone has a solution or know someone, where is the problem?

You should read the app description carefully, you need to either raise the php mem limit, or install the built in CODE server from cli. If you cant use cli, you could ask the hosting provider to raise the mem limit. 512mb should be ok iirc