Note that the "ls" command is quoted using back-tick characters, not normal (apostrophe) single-quite characters. The difference is critical.
An alternative notation might be "$(( ls Server_logs/*.log ))", but without actually trying it
I'm not sure.
The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.
You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.