org.glassfish.jersey.server.ParamException$QueryParamException:

I'm having this error from time to time. I'm still trying to debug it and get a decent reproduction case.

Just posting here meanwhile to see if I'm not the only one.

Are you using the latest official release without any code changes?

No, there are some little changes.

this explains it:

https://github.com/traccar/traccar-web/issues/1365

I wasn't alone after all.