can't run successfuly manimgl example_scenes.py OpeningManimExample

[pifparfait]

Warning: Using the default configuration file, which you can modify in /Users/parfait/manim/manimlib/default_config.yml
If you want to create a local configuration file, you can create a file named custom_config.yml, or run manimgl --config

Animation 0: WriteText: 0%| | 0/60 [00:00<?, ?it/s]2021-04-14 09:51:26.794 python[86292:2301108] Warning: Expected min height of view: (<NSPopoverTouchBarItemButton: 0x7fd3b1d16be0>) to be less than or equal to 30 but got a height of 32.000000. This error will be logged once per view in violation.
2021-04-14 09:51:26.795 python[86292:2301108] Warning: Expected min height of view: (<NSButton: 0x7fd3b1d37b40>) to be less than or equal to 30 but got a height of 32.000000. This error will be logged once per view in violation.
2021-04-14 09:51:26.797 python[86292:2301108] Warning: Expected min height of view: (<NSPopoverTouchBarItemButton: 0x7fd3b1d395f0>) to be less than or equal to 30 but got a height of 32.000000. This error will be logged once per view in violation.
2021-04-14 09:51:26.799 python[86292:2301108] Warning: Expected min height of view: (<NSPopoverTouchBarItemButton: 0x7fd3b1d435f0>) to be less than or equal to 30 but got a height of 32.000000. This error will be logged once per view in violation.
ERROR:root:"

LaTeX Error! Not a worry, it happens to the best of us.

Missing $ inserted.

[TonyCrane]

What's your code. The log said "Missing $ inserted", please check it.