1
5 is so old I would treat it as "migrating from a generic website to Drupal 9."
I would try to approach this using the Feeds module, which allows you to import content from one site into another.
There was no version of Feeds for Drupal 5 (started with 6), but you should be able to find some way to export the content with Views in 5 (perhaps to CSV?...
1
If the "node" entity type does not exist, you have a fundamentally broken installation, but it's not possible to say exactly how it's broken based on the information given.
There are a couple things I would inspect at this point:
Is your local database complete? Did the import perhaps fail?
Is the cache out-of-date? Try truncating every database ...
1
The admin/structure/pages route is handled by the Page Manager module, which is included in the Drupal 7 version of the Chaos Tool Suite (ctools) project.
For Drupal 8 and Drupal 9, it's a separate project: the Page Manager project. The route is handled by the Page Manager UI module that is part of that project. Installing only the Page Manager module doesn'...
1
If I understand your question correctly and it is indeed a bug (so that there is no proper solution to your problem) I can think of at least 2 ways you could work around this.
1. hook_migrate_prepare_row / hook_migrate_MIGRATION_ID_prepare_row
You could use hook_migrate_prepare_row or hook_migrate_MIGRATION_ID_prepare_row to preprocess your source data and ...
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