Raise error for unrecognised input before new data structure check

[timothy-nunn]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 52.15%. Comparing base (a52c41e) to head (530325c).

Files with missing lines	Patch %	Lines
process/core/input.py	33.33%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4222   +/-   ##
=======================================
  Coverage   52.15%   52.15%           
=======================================
  Files         148      148           
  Lines       30435    30435           
=======================================
  Hits        15874    15874           
  Misses      14561    14561           

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