A number of levels in version are known to be broken, and require some workarounds to complete. Some of these issues affect multiple levels, I only give the first level you are likely to come across them.
Unofficial partial fixes
Some of the levels can be fixed by replacing the game's campaign folder with an amended version from GitHub, provided by the user ERYK500.
#new-patch-talk channel.This is a limited fix as some of the issues are engine limitations, which require a game update to resolve.
Symphony Counter
Missing bit-width tool and 16-bit
You should be able to place 16-bit components, but the bit-width tool might not be present in the level.
You can try pasting the following line into levels.txt (which is found in your save folder, check the location in Options):
symphony_register_1,true,10000,10000,0,Default
If your game is running, restart the game to ensure the changes take effect.
Some people report that the bit-width tool appears simply by going to the Sandbox then component factory. This works only if you first hoover the cursor over wire colors tool in a way that color panel stays open when the cursor is moved away and than click on Sandbox button.
If that does not work you can copy-paste 16-bit components from the sandbox.
The level log mentions "like in the register level", disregard that as that level has been removed, and this text not yet been updated to match.
Wire Spaghetti
API test marker.