Hello! I have the same problem. I requested password reset for admin, but the import is not working at all.
So, basically:
1- In a old WP 3.7.1 instance, I exported the users with plugin “Export User Data version 0.7.4” (compatible up to WP 3.6.1). Then, I tried to import the users in a new WP 3.7.1 instance with “Import Users from CSV version 1.0.0” plugin (compatible up to WP 3.6.1). As soon as I selected the csv file and click “Import”, I got kicked out of the admin interface. I requested a new password, logged in, and nothing was imported.
As I have a user with the same name (marie) in my old WP instance and the new WP instance, I deleted the line in the csv for the admin user. Then, I tried to import the csv file. Same pattern: kicked out, nothing imported.
1- With WP 3.7.1, I exported the users with plugin “Export Users to CSV version 0.3” (compatible up to WP 3.3.2). Then, I tried to import the users with “Import Users from CSV version 1.0.0” plugin (compatible up to WP 3.6.1). As soon as I selected the csv file and click “Import”, I got kicked out of the admin interface. I requested a new password, logged in, and nothing was imported.
Again, as I have a user with the same name (marie) in my old WP instance and the new WP instance, I deleted the line in the csv for the admin user. Then, I tried to import the csv file. Same pattern: kicked out, nothing imported.
Any clue?