My site which used DOKAN plugin didn't work properly.
So I tried to remove the database and uninstall the wordpress on the server.
I didn't change the domain at that time.
After that, I created new database and installed the wordpress again on the server.
And I entered the license key again for DOKAN plugin. However, the wordpress admin panel said Dokan Error: Pleae activate your copy.
What should I do to activate the DOKAN plugin ? I can't activate it permanently?