Minecraft 1.20.5 has changed syntax on many commands, so most commands will no longer work without an update. Below is table of the website update progress.
Read the official Mojang release information
https://www.minecraft.net/en-us/article/minecraft-java-edition-1-20-5
| URI | 1.20.5+ output |
1.20.5+ import |
|---|---|---|
| Setblock | ✓ | ✓ |
| Mob Generator | ✓ | ✓ |
| - Summon Area Effect Cloud | ✓ | ✓ |
| - Summon Tnt | ✓ | ✓ |
| - Summon Other Entities | ✓ | ✓ |
| Particle | ✓ | ✓ |
| New Mobs And Items | ✓ | ✓ |
| - Wolf Types And Armor | ✓ | ✓ |
| Banners | ✓ | ✓ |
| Give Command Generator | ✓ | ✓ |
| - Armor | ✓ | ✓ |
| - Containers | ✓ | ✓ |
| - Enchanted Books | ✓ | ✓ |
| - Fireworks | ✓ | ✓ |
| - Goat Horn | ✓ | ✓ |
| - Knowledge Books | ✓ | ✓ |
| - Player Heads | ✓ | ✓ |
| - Potions | ✓ | ✓ |
| - Signs | ✓ | ✓ |
| - Written Books | ✓ | ✓ |
| Summon Item | ✓ | ✓ |
| Summon Falling Block | ✓ | ✓ |
| Summon Block Display | ✓ | ✓ |