The combo box in the web page cannot be selected

I have installed the plug-in for uipath to use the browser
Please help me, I entreat you

Welcome to the UiPath community @shoucansc

Make sure you are using select activity and not click activity for checkbox

Also make your selector dynamic by removing dependent element so that it is valid for that element(in both State - checked and unchecked)

You can use UI explorer to get a better idea on what elements will help you to create a dynamic selector

Thank you for your reply
I use the click element, but it cannot select this element, which will cause an error

as you are having the target element from a drop down, you should use the “Select Item” activity and NOT the click.

Search for the “Select Item” activity and use that for dropdown element, then you will be able to provide the selection.