Question edit Css and Scss of kunena 6 template Aurelia

I follow in githup the edit Css and Scss of kunena template Aurelia
my question is should the names of various php files now with all lowercase letters or may also contain a capital letter.
This is because I can sometimes make it work well locally
but on live sites sometimes get an error message
If I make the php file name lowercase it suddenly works.
Or could this also be a server setting?
it seems that with Updates that differences in the names occur
 

Hello,

If it causes issues i will change it and put all on lower case, i will make the change like tha you can test it to see if it's better

I have just made the changes, try with last dev build available under download to see if it's better

now all lowercase characters now tested on various sites works well.
only I seem to notice that when I put a code in Aurelia css it is not taken over.
if I put it in Aurelia SCSS it works right away

In which file you had put CCS code ?

the first time Css in Aurelia custom.css it didn't work.
custom.css emptied  en put the code the second time in Edit Scss Aurelia custum.scss it worked right away