Site breaking URL Slug

For some reason the plugin suddenly started to add this to the URL slug.
nl_NLhttps://www.kinjin.nlhttphttps://kinjin.nlhttps://www.kinjin.nlhttps://kinjin.nlhttps://www.kinjin.nl/

Completely breaking the site when you try and vist it. We have temperately disabled the to prevent it from breaking the site. any info on how to fix this bug would be much appreciated.

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