Better error handling NCBI down

[manulera]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.43%. Comparing base (4beb3d7) to head (80bd9b7).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #377      +/-   ##
==========================================
- Coverage   96.82%   95.43%   -1.40%     
==========================================
  Files          28       28              
  Lines        1639     1642       +3     
==========================================
- Hits         1587     1567      -20     
- Misses         52       75      +23     

Flag	Coverage Δ
unittests	95.43% <100.00%> (-1.40%)	⬇️

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