Unity WebGL file loading blocked due to MIME type mismatch,Unity WebGL file blocked due to MIME mismatch.

@NenoSun ! Hi I'm facing error like that your facing how to solve this error ? will you help me to sort out t his error? this is my Gmail : bsse386@gmail.com I'm waiting for your response

Not sure if it'll apply to a build that's not using compression fallback, but I was getting the same error as you - only thing I found that seemed to do anything was adding ForceType application/javascript to the .js.gz files (courtsey of opertoonist).

Here's a copy of my working .htaccess file, in case it helps:

 #enable cached data to be read
 Header set Content-Security-Policy "worker-src 'self' blob:; script-src 'self' blob:;"

<IfModule mod_mime.c>

 # compression disabled?
 AddType application/wasm .wasm
 AddOutputFilterByType DEFLATE application/wasm

 # support for compressionfallback option
 AddEncoding gzip .unityweb

 # Gzip support
 <Files *.js.gz>
     AddType application/javascript .gz
     AddEncoding gzip .gz
     ForceType application/javascript
 </Files>
 <Files *.wasm.gz>
     AddType "application/wasm" .gz
     AddEncoding gzip .gz
 </Files>

 <Files *.data.gz>
     AddType "application/octet-stream" .gz
     AddEncoding gzip .gz
 </Files>

 # brotli support
 <Files *.js.br>
     AddType "text/javascript" .br
     AddEncoding br .br
 </Files>

 <Files *.wasm.br>
     AddType "application/wasm" .br
     AddEncoding br .br
 </Files>

 <Files *.data.br>
     AddType "application/octet-stream" .br
     AddEncoding br .br
 </Files>

</IfModule>

Build Publishing Settings used were: https://i.imgur.com/NX16MKm.png

• compression format: gzip

• files as hashes: no

• data caching: yes

• debug symbols: no

• decompression fallback: yes