Fix Dashboards and Charts drop a red 'Unexpected error' message for anonymous users

[trepmag]

Fix #16507...

[codecov]

Codecov Report

Merging #16538 (ffadfcf) into master (80c39da) will increase coverage by 0.01%.
The diff coverage is 78.43%.

❗ Current head ffadfcf differs from pull request most recent head f7d332f. Consider uploading reports for the commit f7d332f to get more accurate results

@@            Coverage Diff             @@
##           master   #16538      +/-   ##
==========================================
+ Coverage   76.72%   76.73%   +0.01%     
==========================================
  Files        1002     1003       +1     
  Lines       53798    53875      +77     
  Branches     6858     7291     +433     
==========================================
+ Hits        41274    41343      +69     
- Misses      12287    12292       +5     
- Partials      237      240       +3     

Flag	Coverage Δ
javascript	70.99% <47.50%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...t-frontend/src/filters/components/GroupBy/index.ts	60.00% <ø> (ø)
...set-frontend/src/filters/components/Range/index.ts	90.00% <ø> (ø)
...et-frontend/src/filters/components/Select/index.ts	90.00% <ø> (ø)
...rset-frontend/src/filters/components/Time/index.ts	100.00% <ø> (ø)
...rontend/src/filters/components/TimeColumn/index.ts	90.00% <ø> (ø)
...frontend/src/filters/components/TimeGrain/index.ts	90.00% <ø> (ø)
.../CRUD/data/database/DatabaseModal/ExtraOptions.tsx	93.18% <ø> (ø)
superset/db_engine_specs/rockset.py	53.12% <ø> (+1.60%)	⬆️
superset/db_engine_specs/__init__.py	50.00% <25.00%> (ø)
superset-frontend/src/components/Select/Select.tsx	72.45% <36.36%> (-2.32%)	⬇️
... and 15 more

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