I have the following error when adding GraphIO and ParserCombinator in a brand new Julia 1.9.3 Linux installation:
Warning: Module GraphIOGMLExt with build ID ffffffff-ffff-ffff-0000-177dba44e6bc is missing from the cache.
│ │ This may mean GraphIOGMLExt [10735248-2040-59e9-9abe-fdd6b710d968] does not support precompilation but is imported by a module that does.
│ └ @ Base loading.jl:1793
│ ┌ Error: Error during loading of extension GraphIOGMLExt of GraphIO, use `Base.retry_load_extensions()` to retry.
...
I’ve opened an issue to track it there: Precompilation error with ParserCombinator · Issue #56 · JuliaGraphs/GraphIO.jl · GitHub
There is a similar error with a different package combination here. Maybe it’s related?