fix: show a helpful message when sdk call syntax generation fails

[josephaxisa]

[github-actions]

APIX Tests

0 files   -     1  0 suites   - 77   0s ⏱️ - 3m 16s
0 tests  - 317  0 ✔️  - 304  0 💤  - 13  0 ❌ ±0 
0 runs   - 333  0 ✔️  - 320  0 💤  - 13  0 ❌ ±0 

Results for commit ef6fe72. ± Comparison against base commit 0895f80.

This pull request removes 317 tests.

 DocTitle renders a heading with title prop content ‑  DocTitle renders a heading with title prop content
 MethodBadge renders with the provided verb ‑  MethodBadge renders with the provided verb
ApiSpecSelector it fires a SELECT_SPEC action when another spec is selected ‑ ApiSpecSelector it fires a SELECT_SPEC action when another spec is selected
ApiSpecSelector it lists all available specs ‑ ApiSpecSelector it lists all available specs
ApiSpecSelector the default spec is selected by default ‑ ApiSpecSelector the default spec is selected by default
CodeCopy displays code and clipboard UI ‑ CodeCopy displays code and clipboard UI
CodeDisplay it highlights text matching search pattern ‑ CodeDisplay it highlights text matching search pattern
CodeDisplay it syntax highlights ‑ CodeDisplay it syntax highlights
CodeDisplay utils it can syntax highlight all supported sdk langs ‑ CodeDisplay utils it can syntax highlight all supported sdk langs
CodeDisplay utils it highlights as markup for unsupported/undefined language ‑ CodeDisplay utils it highlights as markup for unsupported/undefined language
…

[github-actions]

APIX Tests

    1 files  ±0    77 suites  ±0   3m 3s ⏱️ -13s
318 tests +1  305 ✔️ +1  13 💤 ±0  0 ❌ ±0 
334 runs  +1  321 ✔️ +1  13 💤 ±0  0 ❌ ±0 

Results for commit 819207a. ± Comparison against base commit 0895f80.

[jkaster]

LGTM