Show a better error when the forked node responds with "Missing trie node"

[fvictorio]

When a user forks a non-archive node, they eventually get the "Missing trie node". We should intercept this error and show a better error message instead.

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This issue was marked as stale because it didn't have any activity in the last 30 days. If you think it's still relevant, please leave a comment indicating so. Otherwise, it will be closed in 7 days.

[github-actions[bot]]

This issue was closed because it has been stalled for 7 days with no activity.