Unity6000.0.4f1c1 webgl build send bytes error #33

004.framework.js.br:9 Uncaught ReferenceError: buffer is not defined
at _WebSocketSend (004.framework.js.br:9:144574)
at 004.wasm.br:0x38622a9
at invoke_iiii (004.framework.js.br:9:419715)
at 004.wasm.br:0x2b6843a
at 004.wasm.br:0x38622f0
at invoke_iiiii (004.framework.js.br:9:420026)
at 004.wasm.br:0x2b682ac
at 004.wasm.br:0x38622fe
at invoke_viii (004.framework.js.br:9:419865)
at 004.wasm.br:0x2b6e732
at 004.wasm.br:0x2db9037
at 004.wasm.br:0x2ddd195
at 004.wasm.br:0x38622a9
at invoke_iiii (004.framework.js.br:9:419715)
at 004.wasm.br:0x2ddc840
at 004.wasm.br:0xe2d02
at 004.wasm.br:0x382d945
at 004.wasm.br:0x37c5e2b
at 004.wasm.br:0x3123ab0
at 004.wasm.br:0x375bf4e
at 004.wasm.br:0x311edfd
at 004.wasm.br:0x311f115
at 004.wasm.br:0x311e193
at 004.wasm.br:0x311c93f
at 004.wasm.br:0x35fc9d4
at 004.wasm.br:0x35fca49
at 004.wasm.br:0x3836603
at 004.wasm.br:0x3862306
at 004.framework.js.br:9:19798
at _JS_CallAsLongAsNoExceptionsSeen (004.framework.js.br:9:19812)
at 004.wasm.br:0x3830af2
at 004.wasm.br:0x3862306
at browserIterationFunc (004.framework.js.br:9:111568)
at callUserCallback (004.framework.js.br:9:93930)
at Object.runIter (004.framework.js.br:9:95297)
at Browser_mainLoop_runner (004.framework.js.br:9:111094)