Is a person who unintentionally disseminates incorrect religious information and rulings sinful, and is a person who disseminates religious information and rulings rewarded?

One must be diligent in disseminating information by transmitting it from reliable sources. If an error occurs after due diligence, there is no sin, as Allah the Almighty says: (And there is no blame upon you for that in which you have erred, but [only for] what your hearts have intended). If the error is discovered after publication, it must be deleted or a correction issued. By spreading goodness, you attain the reward of da'wah (inviting to Islam) and knowledge, as Allah the Almighty says: (And who is better in speech than one who invites to Allah).