Html 5 Launching engine loop

Development Platform & Builds
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1

Packaging for html5 is successful, however on localhost its stuck on “launching engine”. Any solutions please ?

below are the errors on the chrome console

Source map information is not available, emscripten_log with EM_LOG_C_STACK will be ignored. Build with “–pre-js $EMSCRIPTEN/src/emscripten-source-map.min.js” linker flag to add source map loading to code.
Module.printErr @ MemoryPalace.UE4.js:110

720f18f7-4906-4a31-ac6c-057c4e0d74a6:1 DebugBreak() called!
at __ZN17FOpenGLDynamicRHI19InitializeGLTextureEP11FRHITexturejjbbbhjjjjRK18FClearValueBindingP26FResourceBulkDataInterface (wasm-function[54613]:244)
at __ZZN17FOpenGLDynamicRHI31RHICreateTexture2D_RenderThreadER24FRHICommandListImmediatejjhjjjR22FRHIResourceCreateInfoENKUlvE_clEv (wasm-function[53346]:102)
at __ZN19UE4Function_Private18TFunctionRefCallerIZN17FOpenGLDynamicRHI31RHICreateTexture2D_RenderThreadER24FRHICommandListImmediatejjhjjjR22FRHIResourceCreateInfoEUlvE_FvvEE4CallEPv (wasm-function[53344]:3)
at __ZNK19UE4Function_Private16TFunctionRefBaseINS_16FFunctionStorageEFvvEEclEv (wasm-function[9403]:147)
at __Z26RunOnGLRenderContextThread9TFunctionIFvvEEb (wasm-function[54876]:83)
at __ZN17FOpenGLDynamicRHI31RHICreateTexture2D_RenderThreadER24FRHICommandListImmediatejjhjjjR22FRHIResourceCreateInfo (wasm-function[52900]:490)
_emscripten_log_js @ 720f18f7-4906-4a31-ac6c-057c4e0d74a6:1

MemoryPalace.UE4.js:110 exception thrown: Error
at Array. (blob:http://localhost:8000/720f18f7-4906-4a31-ac6c-057c4e0d74a6:1:38832)
at _emscripten_asm_const_v (blob:http://localhost:8000/720f18f7-4906-4a31-ac6c-057c4e0d74a6:1:43514)
at __ZN17FOpenGLDynamicRHI19InitializeGLTextureEP11FRHITexturejjbbbhjjjjRK18FClearValueBindingP26FResourceBulkDataInterface (wasm-function[54613]:249)
at __ZZN17FOpenGLDynamicRHI31RHICreateTexture2D_RenderThreadER24FRHICommandListImmediatejjhjjjR22FRHIResourceCreateInfoENKUlvE_clEv (wasm-function[53346]:102)
at __ZN19UE4Function_Private18TFunctionRefCallerIZN17FOpenGLDynamicRHI31RHICreateTexture2D_RenderThreadER24FRHICommandListImmediatejjhjjjR22FRHIResourceCreateInfoEUlvE_FvvEE4CallEPv (wasm-function[53344]:3)
at __ZNK19UE4Function_Private16TFunctionRefBaseINS_16FFunctionStorageEFvvEEclEv (wasm-function[9403]:147)
at __Z26RunOnGLRenderContextThread9TFunctionIFvvEEb (wasm-function[54876]:83)
at __ZN17FOpenGLDynamicRHI31RHICreateTexture2D_RenderThreadER24FRHICommandListImmediatejjhjjjR22FRHIResourceCreateInfo (wasm-function[52900]:490)
at __Z35RHICreateTargetableShaderResource2DjjhjjjbR22FRHIResourceCreateInfoR12TRefCountPtrI13FRHITexture2DES4_j (wasm-function[70014]:376)
at __ZN30FTextureRenderTarget2DResource14InitDynamicRHIEv (wasm-function[148332]:229)
Module.printErr @ MemoryPalace.UE4.js:110

MemoryPalace.html:1 Uncaught (in promise) Error
at Array. (blob:http://localhost:8000/720f18f7-4906-4a31-ac6c-057c4e0d74a6:1:38832)
at _emscripten_asm_const_v (blob:http://localhost:8000/720f18f7-4906-4a31-ac6c-057c4e0d74a6:1:43514)
at __ZN17FOpenGLDynamicRHI19InitializeGLTextureEP11FRHITexturejjbbbhjjjjRK18FClearValueBindingP26FResourceBulkDataInterface (wasm-function[54613]:249)
at __ZZN17FOpenGLDynamicRHI31RHICreateTexture2D_RenderThreadER24FRHICommandListImmediatejjhjjjR22FRHIResourceCreateInfoENKUlvE_clEv (wasm-function[53346]:102)
at __ZN19UE4Function_Private18TFunctionRefCallerIZN17FOpenGLDynamicRHI31RHICreateTexture2D_RenderThreadER24FRHICommandListImmediatejjhjjjR22FRHIResourceCreateInfoEUlvE_FvvEE4CallEPv (wasm-function[53344]:3)
at __ZNK19UE4Function_Private16TFunctionRefBaseINS_16FFunctionStorageEFvvEEclEv (wasm-function[9403]:147)
at __Z26RunOnGLRenderContextThread9TFunctionIFvvEEb (wasm-function[54876]:83)
at __ZN17FOpenGLDynamicRHI31RHICreateTexture2D_RenderThreadER24FRHICommandListImmediatejjhjjjR22FRHIResourceCreateInfo (wasm-function[52900]:490)
at __Z35RHICreateTargetableShaderResource2DjjhjjjbR22FRHIResourceCreateInfoR12TRefCountPtrI13FRHITexture2DES4_j (wasm-function[70014]:376)
at __ZN30FTextureRenderTarget2DResource14InitDynamicRHIEv (wasm-function[148332]:229)

MemoryPalace.html:1 Uncaught (in promise) storeToIndexedDB: IndexedDB writes disabled by “?noidbwrite” option

2

I have a similar issue as well, with as last error at launching engine:

Uncaught (in promise) storeToIndexedDB: IndexedDB writes disabled by "?noidbwrite" option
3

I had this issue on 4.23. Dont know if its the same…

UE4.23 HTML5 build stuck at “Launching Engine…” - Development / Platform & Builds - Epic Developer Community Forums (unrealengine.com)