It looks like Bootstrap Element blocks other extensions.

I tried the apply another extension (Project7 Accordion) on a page and dreamweaver shows an error that the code would be blocked by a template or translator and the chances will not be done. This only happens when BE is installed and/or active.

Hello,

Please provide a link to such a page where we can check this.

I've just created an empty page (to send to you) and it works there. I'll keep you informed as soon as I've found the problem. Looks like some other includes file(s) causes the problem...

Just found it, some *.js/*.css files has been placed before the opeing head tag. This caused the problem. Thanks for your support.