fix: improve error message

[JoanFM]

Pull Request Title

Description

Please describe what your PR is doing and why. Are there any parts which need extra attention during review? Are there any dependencies from other PRs or projcts? Is this a breaking change?

Is this PR ready or work in progress (WIP)? Ready means it can be reviewed and merged from the author's perspective. If the PR is WIP: Make it a draft PR and state open questions and TODO items.

Closes # (issue)

[github-actions]

Latency summary

Current PR yields:

• 🐢🐢 index QPS at 1030, delta to last 2 avg.: -23%
• 🐎🐎🐎🐎 query QPS at 42, delta to last 2 avg.: +57%
• 😶 avg flow time within 1.3231 seconds, delta to last 2 avg.: +0%
• 🐢🐢 import jina within 0.353 seconds, delta to last 2 avg.: -17%

Breakdown

Version	Index QPS	Query QPS	Avg Flow Time (s)	Import Time (s)
current	1030	42	1.3231	0.353
2.6.4	1399	27	1.5293	0.3833
2.6.3	1293	25	1.1175	0.4693

Backed by latency-tracking. Further commits will update this comment.

[codecov]

Codecov Report

Merging #4245 (dfea68e) into master (bfd5357) will decrease coverage by 0.44%.
The diff coverage is 95.60%.

@@            Coverage Diff             @@
##           master    #4245      +/-   ##
==========================================
- Coverage   87.73%   87.29%   -0.45%     
==========================================
  Files         113      113              
  Lines        8254     8304      +50     
==========================================
+ Hits         7242     7249       +7     
- Misses       1012     1055      +43     

Flag	Coverage Δ
daemon	42.10% <15.38%> (-0.11%)	⬇️
jina	87.04% <95.60%> (+0.11%)	⬆️

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

Impacted Files	Coverage Δ
jina/parsers/flow.py	100.00% <ø> (ø)
jina/parsers/orchestrate/base.py	100.00% <ø> (ø)
jina/parsers/orchestrate/runtimes/worker.py	100.00% <ø> (ø)
jina/clients/mixin.py	87.03% <75.00%> (-3.44%)	⬇️
jina/orchestrate/flow/base.py	91.00% <88.88%> (-0.07%)	⬇️
jina/excepts.py	100.00% <100.00%> (ø)
...a/orchestrate/deployments/config/docker_compose.py	100.00% <100.00%> (ø)
jina/orchestrate/deployments/config/helper.py	98.27% <100.00%> (+2.12%)	⬆️
jina/orchestrate/deployments/config/k8s.py	100.00% <100.00%> (ø)
.../runtimes/request_handlers/data_request_handler.py	93.91% <100.00%> (+1.28%)	⬆️
... and 4 more

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