Invalid biome file reports on Bedrock server startup

Running BDS server 1.21.102.1 on Linux. On server startup the following errors appear:

[2025-09-19 17:18:45:939 INFO] Starting Server
[2025-09-19 17:18:45:939 INFO] Version: 1.21.102.1
[2025-09-19 17:18:45:939 INFO] Session ID: 4d259a87-b24b-4507-bb1f-ad3feb57b470
[2025-09-19 17:18:45:939 INFO] Build ID: 36160546
[2025-09-19 17:18:45:939 INFO] Branch: r/21_u10
[2025-09-19 17:18:45:939 INFO] Commit ID: 468d0e14b95e8c003f79d1a82cdaa729522efab6
[2025-09-19 17:18:45:939 INFO] Configuration: Publish
[2025-09-19 17:18:45:939 INFO] Level Name: The Towers
[2025-09-19 17:18:45:940 INFO] No CDN config file found for dedicated server
[2025-09-19 17:18:45:940 INFO] Game mode: 0 Survival
[2025-09-19 17:18:45:940 INFO] Difficulty: 2 NORMAL
[2025-09-19 17:18:45:940 INFO] Content logging to console is enabled.
[2025-09-19 17:18:46:391 INFO] Opening level 'worlds/The Towers/db'
[2025-09-19 17:18:46:413 INFO] [SERVER] Pack Stack - None
[2025-09-19 17:18:46:784 ERROR] [Structure] The Towers |  -> minecraft:jigsaw_structure_metadata -> metadata[0] -> markers[0] -> joint_type: This value is bound to 'Jigsaw Joint Type' and expects one of the fol|
lowing strings: 'rollable', 'aligned'. Found: ''
[2025-09-19 17:18:46:813 ERROR] [BiomeRegistry] The Towers | biomes_server | Invalid Biome file biomes/cold_taiga_mutated.biome.json:  -> minecraft:biome -> description -> identifier:  identifier has an upper c|
ase letter or does not specify any namespace
[2025-09-19 17:18:46:813 ERROR] [BiomeRegistry] The Towers | biomes_server | Failed to load biome document: biomes/cold_taiga_mutated.biome.json
[2025-09-19 17:18:46:813 ERROR] [BiomeRegistry] The Towers | biomes_server | Invalid Biome file biomes/cold_taiga_hills.biome.json:  -> minecraft:biome -> description -> identifier:  identifier has an upper cas|
e letter or does not specify any namespace
[2025-09-19 17:18:46:813 ERROR] [BiomeRegistry] The Towers | biomes_server | Failed to load biome document: biomes/cold_taiga_hills.biome.json
[2025-09-19 17:18:46:813 ERROR] [BiomeRegistry] The Towers | biomes_server | Invalid Biome file biomes/cold_taiga.biome.json:  -> minecraft:biome -> description -> identifier:  identifier has an upper case lett|
er or does not specify any namespace
[2025-09-19 17:18:46:813 ERROR] [BiomeRegistry] The Towers | biomes_server | Failed to load biome document: biomes/cold_taiga.biome.json
[2025-09-19 17:18:46:877 ERROR] [FeatureRegistry] The Towers | No definition found for feature 'minecraft:legacy:roofed_forest_foliage_feature'
[2025-09-19 17:18:47:124 INFO] IPv4 supported, port: 19132: Used for gameplay and LAN discovery
[2025-09-19 17:18:47:124 INFO] IPv6 supported, port: 19133: Used for gameplay
[2025-09-19 17:18:47:157 INFO] Server started.