Android Question error message after reinstalling, can't run program

I had to reinstall the IDE b4a, I downloaded the sdk only, and not android studio, since I don't need it.

when I run the project, I get error m-
Error
'C:\Program Files (x86)\android\tools\..\extras\b4a_local\unpacked-exoplayer-core-r2.5.3-63643731208000' access denied.

in my "extras" folder there is no "ba4_local" folder...

what should I do?

thanks