Backend validation errors are not displayed in Toolkit forms

[Tigranuhi-A]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.67%. Comparing base (c2efe7a) to head (d178e0c).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #405   +/-   ##
=========================================
  Coverage     80.67%   80.67%           
  Complexity     2472     2472           
=========================================
  Files           229      229           
  Lines          6546     6546           
=========================================
  Hits           5281     5281           
  Misses         1265     1265           

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