Javascript error in the page `ngx-form-errors`

[mhenkens]

🐛 Bug Report

Is this a regression?

[X] No
[ ] Yes, the bug was not present in version: ... 

Current behavior

javascript error in page ngx-form-errors:

Expected behavior

the page ngx-form-errors do not trigger error

🔬 Minimal reproduction of the problem with instructions

open the page ngx-form-errors and check the javascript console

Environment

Angular version: 7.1.3
NgxFormErrors version: 1.1.0


Browser:
- [x] Chrome (desktop) version XX