Accounts view stuck after large import

I imported a large csv file list of accounts and now the Accounts view is stuck at page 2 (accounts 21-50) The other accounts are there and can be accessed through a search or on the home page, but not from the “Accounts” view. I’m very new at this - any ideas how to fix it?

No errors. Did you check the log file.

Check PHP settings: Memory,Execution, etc