Why can't I connect to the wordpress admin after transferring a database from another site?

Question

MySQL

Good afternoon, I was engaged in a very dubious business, but still, I will be glad if you help me.
I transferred the database from one site to another, domains on the same hosting, connected to the database, everything is displayed well.
But for some reason I can not enter the admin panel, an error pops up:

Sorry, you are not allowed to view this page.

I can’t understand what is the reason for this error, while it logs into the account, but does not allow me to get into the admin panel.

Answer 1

Hello!
This means that you transferred the database incorrectly or the database was damaged during the transfer.
Try to migrate the database again. And check user capabilities
https://wordpress.org/support/article/roles-and-ca...
https://www.wpbeginner.com/wp-tutorials/how-to-add...
Pay attention to this paragraph:

unmeta_id – leave this blank (it will be auto-generated)
    user_id – this will be the id of the user you created in the previous step. Remember we picked 4.
    meta_key – this should be wp_capabilities
    meta_value – insert this: a:1:{s:13:"administrator";s:1:"1";}