We may be good..
It seems, and I recall seeing mention of it before, that PHP 7.1 has stupid issues with thread safe. I recall seeing a few times as we were planning our upgrade from 5.6 that people said to just go to 7.2 and that is what we did. Last night I then had to go backwards because GO only works with 7.1
Why would you guys not make GO work with 7.2 which is more stable and has no issues with thread safe? This screwed us for hours this morning, after I had to spend hours late into the night last night just trying to back down to 7.1 as well.
The fix, so far, seems to be to run as fastcgi instead of loading the DLL for php. One such remark about thread safe being broken in 7.1 is found here (there are many others in other sites).