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Hello @martyshka,
You have a license for one domain, but you have activated it for two.
I reset the domains associated with your key.
The plugin can be activated on any domain again.
Please use a subdomain or WordPress multisite network for staging sites, then the license will be active for both.
The license can also be successfully activated additionally on the local copy of the site, but for this the domain of the local copy must be identical to the production site.
In the future, please contact support directly, this forum is not for discussing Pro version.