Tomcat 9.0 service stops after starting

Similar issue - "Thwx 7.4: Failed to load FlxCore library": https://community.ptc.com/t5/ThingWorx-Developers/Thwx-7-4-Failed-to-load-FlxCore-library/td-p/520920 

8.1? Wow, that's real vintage, when was that released, like 2018? Not sure why you'd want to run a software that old, but if you did nothing else but restarting the server (e.g. updating some component), I would assume some files got corrupted. Do you have a backup?

You can run a system check for the integrity of the OS files (I guess this is on Windows), also make sure there is no antivirus blocking the application, the error code suggests is could be that.

Hello @AU_11025381,

It looks like you have some responses from some community experts. If any of these replies helped you solve your question please mark the appropriate reply as the Accepted Solution. 
Of course, if you have more to share on your issue, please let the Community know so other community members can continue to help you.

Thanks,
Vivek N.
Community Moderation Team.

Few things to try:

1. Disable Memory Integrity in Windows
2. Disable the firewall
3. Check if you have multiple versions of this DLL in your system PATH
4. Check the Event Viewer for more detailed or related error messages

/ Constantine

Hi @AU_11025381 

I saw that you opened a case for this issue.  Once the issue is resolved, I will provide an update here for the benefit of our community members.

Regards.

--Sharon

Hi @AU_11025381 

The case has been closed without a solution due to the lack of artifacts needed to investigate the issue.  Were you able to resolve the issue yourself?

Your update on the solution you found would be greatly appreciated.

Regards.

--Sharon