I am getting a warning saying "an issue was detected with this transaction that would cause it to fail" - what should I do?

Recommendations on what you should do in case of failing transaction warnings.

My transaction is being rejected with error 0x6985 - what should I do?

How to resolve a potential issue with using Ledger via MetaMask.

My transaction is pending / not going through - what should I do?

Recommendations for dealing with stuck transactions.