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We are trying to deploy our token (AIDS) on mainnet: https://explorer.solana.com/address/ExCgGC6CEegjjif7yqxpcreEaarb83K8YaXzmf3PRWAZ . When we are trying to create metadata for this token, we call method: sendAndConfirmTransaction from @solana/web3.js - library and get the following error: SendTransactionError: failed to send transaction: Transaction simulation failed: Error processing Instruction 0: custom program error: 0x4b . Can You help us understand what this error means and how to deal with it?"

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If you're trying to create metadata using the metaplex token-metadata program, you can look at the error codes in the source. 0x4b corresponds to the number 75, which is the Removed error code: https://github.com/metaplex-foundation/mpl-token-metadata/blob/965b60860afdf5c73092563b83e534411d088327/programs/token-metadata/program/src/error.rs#L314C1-L314C160

This means the instruction you're trying to use has been removed, so you'll need to update the tools to use a newer instruction.

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