I entered my seed but my multisig wallet is empty

You kept your recovery phrase safe but after restoring the wallet nothing shows up because you are missing the information from the other participants.

The difference between single and multisig accounts

A common mistake is assuming a multisig works like a single-signature account. In a k-of-n setup, your seed only generates one part, but the identity of the wallet depends on the entire group of keys.

When you restore using only your words, the software looks for standard addresses. However, multisig addresses are built by combining your key with those of your partners or your other devices.

What the Bitcoin Core code says

The technical source is descriptors.md de Bitcoin Core, funcion multi(), which states: 'They represent a k-of-n multisig policy, where any k out of the n provided KEY expressions must sign'.

This means the software requires every key expression to calculate where the funds are located. Without the full list, there is no way to know which addresses belong to that specific group.

The file you are missing

To regain access, you need the descriptor. This is the record that contains the public keys of all participants. Without this text, your seed is isolated and lacks a map to navigate the network.

If you do not have the descriptor backup or the public keys of the other parties, your recovery phrase cannot find the bitcoins because it does not know which corner of the blockchain to look at.

What your seed cannot find on its own

Source: descriptors.md de Bitcoin Core, funcion multi()