Beta Launcher breaks on 404 Error for non-Mojang-hosted jars

When running with Optifine installed, the beta launcher fails to start because of a HTTP 404 error. The current launcher doesn't have this issue.

Internal error. Preparing OptiFine-1.13.2_HD_U_E5.jar
Name: Preparing OptiFine-1.13.2_HD_U_E5.jar
Error details: HTTP 404: Not Found
 
[0206/233422:INFO:GameCallbacks.cpp(201)] launcher/launcher (main) debug Preparing OptiFine-1.13.2_HD_U_E5.jar

[0206/233422:INFO:GameCallbacks.cpp(201)] launcher/launcher (main) debug Don't have expected size for OptiFine-1.13.2_HD_U_E5.jar

[0206/233423:INFO:GameCallbacks.cpp(201)] launcher/launcher (main) debug Local file J:\Minecraft\.minecraft\versions\1.13.2-OptiFine_HD_U_E5\1.13.2-OptiFine_HD_U_E5.jar has hash of 30bfe37a8db404db11c7edf02cb5165817afb4d9

[0206/233423:INFO:GameCallbacks.cpp(201)] launcher/launcher (main) debug Preparing launchwrapper-1.12.jar

[0206/233423:INFO:GameCallbacks.cpp(201)] launcher/launcher (main) debug Don't have expected size for launchwrapper-1.12.jar

[0206/233423:INFO:GameCallbacks.cpp(201)] launcher/launcher (main) debug HTTP 404: Not Found

[0206/233423:INFO:GameCallbacks.cpp(201)] launcher/launcher (main) debug Preparing patchy-1.1.jar

[0206/233423:INFO:GameCallbacks.cpp(201)] launcher/launcher (main) error internal_error
Details: HTTP 404: Not Found
Name: Preparing OptiFine-1.13.2_HD_U_E5.jar