Multisite network admin – User’s role not showing up

This worked for me:

Make sure the row in option-table in the database for wordpress-site have the correct option_name for the serialised roles-data.

For instance;
if the database-table is wp_options, the column option_name in the role-row should be wp_user_roles.
if the database-table is wp_20_options, the column option_name in the role-row should be wp_20_user_roles.

Don’t ask me how long it took me to find out.

Hope it helps.