You will find many sites offering an "exclusive" or "fixed" version of this file.
: While not recommended as a first resort due to potential safety risks, you can try downloading the steamapi64.dll file. However, be cautious and only use reputable sources to avoid malware. steamapi64rdll free fixed download exclusive
While many sites offer "free" or "exclusive" downloads of this DLL, You will find many sites offering an "exclusive"