Photo AI plugin to Affinity Photo V2 on MacOS not activating

I can’t seem to get the plugin to work in Affinity Photo V2.

I manually added it to the PS plugins using search folders ‘\Applications’ and plugin support folders '' and I can launch the plugin but I can’t activate it as I keep getting ‘Invalid OAuth state’ back from the Topaz labs website. The stand-alone Photo AI activates without issue.

Please help!