Problems with PDF importing and editing

I understand that the PDF is imported with the SIAC button, it has worked well but suddenly this button doesn’t work. Pressing it doesn’t change anything.
(The Add_Ons currently installed on my anki is shown as the attached screen)

Another problem is, for the use of PDF editing with image occlusion, others users in youtube has this image occlusion button appearing, whereas mine does not (so can’t use that function). How could I make that button appear?

I think the problems are with Image Occlusion Enhanced and Searching PDF Reading Note-Taking in Add Dialog
I removed and reinstalled them many times, but the problems remain.

SIAC button doesn’t work

Add-ons installed on my anki

(When clicking the scissor icon, the ImageOcclusion button is created, but not mine)