Missing textures. See log in attachment.
Basically it can't bake models, here's first line in that log:
[10:03:52] [Client thread/WARN]: Unable to bake model: 'minecraft:vine#east=true,north=false,south=false,up=true,west=true': java.util.ConcurrentModificationException
Environment
OpenJDK 11
Default Arguments: -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Windows 8.1
Intel Core I5 3350P
8GB RAM
GTX 750TI
Thank you for your report!
However, this issue is a Duplicate of MC-137602.
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