Most problems fall into a handful of categories. It is worth checking these before getting in touch, because they account for the large majority of what comes in.
The transaction failed
Almost always insufficient SOL for fees and rent, or a network congestion timeout. Check the balance first, then retry — a failed transaction costs the fee but changes nothing else, so retrying is safe.
The token has no name or image
The mint exists but its metadata didn't resolve. Either the metadata account was never created, or the URI points at a gateway that is slow or down. Wallets and scanners also cache aggressively — a token that looks unnamed immediately after launch often resolves within the hour.
I revoked the wrong authority
There is no way back. Revoking sets the authority to null on-chain and nothing can restore it. If you needed mint authority, the token has to be recreated. This is the single best argument for rehearsing on devnet.
Getting in touch
Use the community links in the footer. Include the mint address and the transaction signature if you have them — with both, most issues can be diagnosed directly from the chain without any back and forth.