Cannot inset new patient

I have used OpenERM for some years on ubuntu, 16.04 LTS 64-bit, without problem. After upgrade to 5.0.1 and patch 1 I am not able to inset a new patient: The button “confirm new patient” doesn’t work. The rest of the program seems to work , incl update of earlier patients journals.
Apache2/Error.log shows:"[Sun May 13 20:57:56.557624 2018] [:error] [pid 3476] [client ::1:48532] PHP Notice: Undefined index: fstart in /var/www/openemr/interface/new/new_search_popup.php on line 15, referer: http://localhost/openemr/interface/main/tabs/main.php

I need some help.

Regards
Jes Drost Nissen

Hi @Jes_Drost_Nissen, have you tried clearing the browser cache?

Thank you very much. Works fine now.

Regards
Jes Drost Nissen