Playground: Fix errors not shown on page load #32760

# to view logs

Job	Run time
Determine changes	11s
mkdocs	2m 40s
cargo fmt	21s
pre-commit	39s
python package	1m 8s
benchmarks	6m 54s
cargo build (msrv)	3m 22s
cargo build (release)	4m 36s
cargo clippy	1m 48s
cargo fuzz	5m 4s
cargo shear	22s
cargo test (linux)	3m 56s
cargo test (wasm)	1m 22s
cargo test (windows)	7m 8s
test scripts	58s
formatter instabilities and black similarity	0s
test ruff-lsp	14s
ecosystem	27s
Fuzz the parser	0s
	41m 10s

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