fix(client): panic explicitly if ctx = nil

[acehinnnqru]

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fix

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.24%. Comparing base (4fce261) to head (d18bc66).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1290   +/-   ##
========================================
  Coverage    72.23%   72.24%           
========================================
  Files          138      138           
  Lines        16137    16139    +2     
========================================
+ Hits         11657    11659    +2     
  Misses        3885     3885           
  Partials       595      595           

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