The error is frustrating, but rarely fatal. In 95% of cases, Method 1 (Verify Integrity) or Method 2 (Antivirus Whitelisting) will solve it instantly. If you’ve tried both and still have the error, move down the list to Methods 5, 7, or 10.
This comprehensive guide provides step-by-step solutions to fix this issue and get you back into Dunwall. What is steam_api.dll? dishonored steamapidll is missing