Cannot Export my plugin (Pinegrow Wordpress Plugin)

Hi there, I have just installed the Pinegrow Wordpress plugin for the first time, in order to develop some custom blocks for my company website.

I have setup the Pinegrow plugin itself without any issues, however when I try to create my own plugin in Pinegrow I am seeing some strange and very unhelpful error messages.

When my blocks page is just HTML, I am able to export the plugin without any issues. However, as soon as I try to turn my into a block (Block Smart Actions > Block > Then fill out the 'Unique ID, title etc) and hit to export the plugin, I get the following error message:

“Project export failed: Unknown Error”

I have then gone into my host and checked the error logs and I see this:

PHP Warning: Undefined array key “non_optional_templates” in /nas/content/live/oxec/wp-content/plugins/pinegrow/public/class-pinegrow-plugin-public.php on line 1965

and this:

PHP Warning: Undefined array key “source_project_id” in /nas/content/live/oxec/wp-content/plugins/pinegrow/public/class-pinegrow-plugin-public.php on line 1959

Please can anyone help as to what is causing this / what this means / how to fix it?

Thanks in advance for your help,