## The problem

Reported in OpenTelemetry: Unable to send trace data to collector using 'examples/opentelemetry-web'.

## The fix

[cristianmadularu (contributor)]: 0.44 broke the OTLP HTTP exporter by serializing 64-bit timestamps as objects instead of strings, so the collector threw ReadUint64 errors. The fix uses BigInt serialization in PR #4220. Upgrade to the latest 0.44.x or newer; cristianmadularu tested the latest version and confirmed it works.