Directives fail with latest drawio

[onavratil-monetplus]

Getting this error

Invalid page index: pages are numbered from 1 (0-based before v27.0.2)

The directive error kills the whole build process. Works flawlessly with 26.2.15 and prior. I do not explicitly set page index via directive options at all.

I assume just adding +1 to this line could fix the bug
https://github.com/modelmat/sphinxcontrib-drawio/blob/main/sphinxcontrib/drawio/__init__.py#L249

[onavratil-monetplus]

It seems to me that the page index 0 was treated as 1 even in some versions after 27.0.2, but this behavior is discontinued in the latest releases - I
tried 31.3.2

[AcerP-py]

I am hitting the same error changing the default at

sphinxcontrib-drawio/sphinxcontrib/drawio/__init__.py

Line 227 in a19a073

page_index = 0

from 0 to 1 fixed it for me.