Some of our customers might have an issue with their Amazon mapping screen being empty. This was caused by a minor issue earlier today which was resolved, but the empty mapping remained as a visual bug.
In order for the channel linking to appear once again please go to Linnworks.net > Settings > Channel Integration > Edit Amazon channel config > Click on 'Download Listings' option. This will request a fresh report from Amazon with all of the SKUs. SKUs that were previously linked won't need re-linking as they will be shown linked. This might take about 10-15 minutes depending on the amount of SKUs coming in from Amazons report.
P.S. This visual problem with the mapping screen does not affect any existing SKU mapping - all mapping remains in place for purposes of downloading orders, updating inventory, and all other processes.