startStaticRender: Map is currently rendering an image error message

[bongbui321]

Describe the bug
I'm trying to use static rendering to render the image using startStaticRender(). From reading the source code, whenever the image is finished rendering, the staticRenderFinished should be emitted. Though I always get the error message Map is currently rendering an image. There is also no examples of using the API.

Expected behavior
Can render an image and extract from the buffer

Platform information (please complete the following information):

• Using Qt version 5.12.8 in /usr/lib/x86_64-linux-gnu