I got this error start from today, same code, same everything, just build failed.

Error: Error waiting for Creating CloudFunctions Function: Error code 3, message: Build failed: # github.com/cloudevents/sdk-go/v2/extensions
src/github.com/cloudevents/sdk-go/v2/extensions/distributed_tracing_extension.go:161:3: cannot use span (type trace.Span) as type *trace.Span in return argument:
*trace.Span is pointer to interface, not interface; Error ID: xxx