Running main scene and clicking start results in error

[RohanRockieGeorge]

Godot version 4.3

E 0:00:02:0915 converter.gd:44 @ _convert(): Manually triggering the draw function from the RenderingServer can only be done on the main thread. Call this function from the main thread or use call_deferred().
<C++ Error> Condition "!Thread::is_main_thread()" is true.
<C++ Source> servers/rendering/rendering_server_default.cpp:403 @ draw()
converter.gd:44 @ _convert()
converter.gd:13 @ get_similar_indexed_datas()
median_cut.gd:159 @ quantize()
exporter.gd:157 @ add_frame()
Main.gd:43 @ export_thread_method()

E 0:00:04:0020 converter.gd:44 @ _convert(): Manually triggering the draw function from the RenderingServer can only be done on the main thread. Call this function from the main thread or use call_deferred().
<C++ Error> Condition "!Thread::is_main_thread()" is true.
<C++ Source> servers/rendering/rendering_server_default.cpp:403 @ draw()
converter.gd:44 @ _convert()
converter.gd:13 @ get_similar_indexed_datas()
median_cut.gd:159 @ quantize()
exporter.gd:157 @ add_frame()
Main.gd:44 @ export_thread_method()