This crashed could be due to a Known Issue: 99525 - A crash can occur when multiple Web Service threads make concurrent calls to PISDK
In order to determine if this is the case, please let me know which version of PI SDK do you have installed in the machine causing the issue. The issue was fixed in version 188.8.131.526.
I have installed PI SDKx64 ver. 184.108.40.2064, I need upgrade the version of PI sdk to 220.127.116.116?, for resolving this issue?
Unfortunatelly the version that you have PI SDKx64 (18.104.22.1684), does not include the fix for the known issue 99525. This known issue was solved in version PI SDKx64 (22.214.171.1246), according to the release notes ( https://techsupport.osisoft.com/Downloads/File/46582d12-2157-40f7-9303-ec333d204568 )
I was looking into several calls an the issue that they were having was very similar to yours, the PI SQL DASx64 was crashing and it was solved by installing the version 126.96.36.1996. All of them mentioned the known issue 99525.
It would be a very good troubleshooting step to do the upgrade of the PI SDKx64 in order to solve the issue.