Game won´t load

Hey,

so I copied all the data from my 4.23 Export to my Webserver. But then this happened:

Downloading failed:
Downloaded a compressed file UE4Game-HTML5-Shipping.wasmgz without the necessary HTTP response header “Content-Encoding: gzip” specified!
Please configure gzip compression on this asset on the web server to serve gzipped assets!
NOTE: attempting to flush cache and force reload…
Please standby…
NOTE: attempting to flush cache and force reload…
Please standby…

And now it´s always stuck at:

NOTE: attempting to flush cache and force reload…
Please standby…
NOTE: attempting to flush cache and force reload…
Please standby…

What should I do? i added this line to the .htacces because I read I should do it online, but it won´t help:

<files *.gz>
AddType “text/javascript” .gz
AddEncoding gzip .gz
</files>

Does anybody know why this happens? And what is that weird header?
Thanks!