Error Trying to Start Import Process - Xenforo to Discourse

[DeanMarkTaylor (Dean Taylor)]

Here is a #howto topic on importing from phpBB which might give you clues towards your target import:

Importing / migrating from phpBB3

So, you discovered Discourse and want to know how to migrate from your existing phpBB3 forum? Great! Then keep on reading. This guide will show you how to use the phpBB3 import script for importing from phpBB 3.0, 3.1 and 3.2. Importing from phpBB 3.3 is currently not supported. This topic will contain a table of contents What data can be imported? Users Avatars (optional) Anonymous users (either as user “system” or as suspended users) Password hashes, which can be used with th…

There is also this more generic howto topic:

Migrating to Discourse from another Forum software

This guide serves as a high level overview of the migration process. For specifics on the wide range of forum softwares to import, including Vanilla, phpBB3, SMF2, bbPress, and vBulletin, review our dedicated tutorials. Not all scripts have tutorials, but an exhaustive list of available imports is available under the script/import_scripts folder on GitHub. So you want to migrate your existing forum to Discourse? That’s great! Let’s get started! 1. Set Up a Development Environment W…