Describe the bug, provide any errors

• When inserting valid config info to the "block-versions" configuration string; running viafabric after that will crash the client but will run just fine if configuration is set to [] instead of ["1.9.x"] as example.

• The crash report can be found here: https://pastebin.com/raw/hNHzPApX

Is this happening specifically on ViaFabric?
(Optional)

• It seems to not happen when using ViaVersion/ViaBackwards/ViaRewind on other backend server software,
• It seems to not happen when using ViaVersion/ViaBackwards/ViaRewind on other proxy server software.

How can we reproduce it?

1. Have ViaFabric installed,
2. Change the "block-versions" config to block specific versions you want,
3. Start the server/client,
4. Possibly crash due to platform not being loaded properly.

Expected behaviour

• ViaFabric should accept the configuration and continue to start up properly.

Screenshots
(Screenshots not available as client cannot be started up during this event)

ViaVersion Dump
Fabric ("block-versions" unmodified as dump is impossible to create with it changed): https://dump.viaversion.com/28bec88ca3bdea5b50759e0d47b9ba6c1d2de0a6701ec96cd93df9dde9919f6a

Paper (With "block-versions" modified, seems to work fine there but not proxies): https://dump.viaversion.com/02783872aca5dd63f066f71f51547b71c916f933bcfd000c69734695a5f23412

Additional server info

• The client does not use a proxy,
• The client has Fabric API, LazyDFU, and ViaFabric during testing,
• The client has client-side mode enabled.