Error - Trying to get property 'fields' of non-object

[Neethu Johns]

Any idea about this error please? Much appreciated if you could help.

I am getting 

"Trying to get property 'fields' of non-object" while hovering over References link.

[Neethu Johns]

Its the Testrail. 

[Hana Kučerová]

@Neethu Johns Have you tried to contact Gurock Software?

[Hana Kučerová]

Hi @Neethu Johns ,

would you provide more information, which application is this? It doesn't look like core Jira functionality. Anyway, if this is connected to some application, I would recommend you to contact vendor of this application, because without logs we probably won't be able to find out, where's the problem.