You can try load it from the cdn: <script src="https://cdn.socket.io/4.6.0/socket.io.min.js" integrity="sha384-c79GN5VsunZvi+Q/WObgk2in0CbZsHnjEqvFxC5DxHn9lTfNce2WW6h2pH6u/kF+" crossorigin="anonymous"></script>
User rthat instead of the /socket.io/socket.io.js line
Now please check if that file (/dmxAppConnect/dmxSockets/dmxSockets.js) already exist in that path in your public folder.
Too you can remove the script and save the file, Wappler will create a new script tag and will add the file in case is missing.