Import CSV – button for import is not displaid

Hello,
a client has some problem with the claim listings verification link (the only client where there is this problem). to make things easier for this client I am just trying to bypass the claim listing process by
1. exporting locations,
2. in the csv changing the author ID and setting “claim” to 1,
3. reimporting the csv.

When reimporting the csv I can upload the csv however, the button “import now” is not being displaid, so I cannot start the import (see screenshot). This is also the case with any other csv I try to import.

My questions:
1) is the above described method an appropriate way to bypass the claiming process?
2) What happened to the “import now”-Button? How can I import a csv?

Thanks for your support!
Birgit