[TYPO3] rounded.corners

[Othmar Voser]

Hi, I am trying to use the extension rounded.corners. Unfortunately it 
does not work. The original picture will be replaced by a white square. 
The name will be changed to the original filename with the extension 
"-rounded". I was trying to change in the install-section the word 
“combine” with “composite”, but without success. I am working with Typo 
4.1.5 and IM 4.2.9. Any suggestions? Thanks a lot.