Troubleshooting

Studio shows provider diagnostics beside the source line they name. Start with the first error in Source or in marimo-studio view inspect.

Symptom	Cause	Repair
The build fails at a scene line	The scene fails with every read at its default	Give the read a default the scene can render
manim-scene-missing at a host in index.html	The host names a scene file that does not exist	Create the file or show another scene
Found none in a render error	The scene file defines no manimlib.Scene subclass	Define one scene class in the file
Found A, B in a render error	The file defines two unrelated scene classes	Move one into its own scene file with its own render host
manim-read-dynamic warning	A read's target is computed	Write the target as a string literal
The toolbar says Showing the default for <target>.	The notebook has no current result, or it has no image form	Run the cell, check the selector, or read a figure variable with output()
The scene contains no frames	construct() neither plays nor waits	Add self.play() or self.wait()
A movie stays stale for a long time	The scene renders slowly	Set quality = "draft" while iterating, or shorten run_time
OpenGL errors on Linux	No usable OpenGL driver	Install Mesa as Run and export shows
Tex fails to render	No LaTeX on the machine that renders	Install LaTeX, or use Text

Studio's troubleshooting guide covers builds, previews, and sessions for every view.