FMod with Godot 3.5 on Linux - no audio in exported game

[loteque]

Godot 3.5 on Linux, fmod-gdnative plugin works in the editor. I can hear the sounds when I test the game through the Godot editor. When I export the game it has no sound. Any help much appreciated.

Update: Just tested on windows and it is the same result. banks work in the editor but no sound on export.

Update 2: I this related? #67 (comment)
specifically: "When exporting a project, don't forget to add .bank and .ogg files in the options, otherwise Godot won't include them."
If so this seems like a critical instruction to include in the readme...
Will test and report back.

Update 3:
Ok - here is the logfile:
It looks like it isn't finding the fmod api module?

Godot Engine v3.5.stable.official.991bb6ac7 - https://godotengine.org
OpenGL ES 3.0 Renderer: NVIDIA GeForce GTX 970/PCIe/SSE2
Async. shader compilation: OFF

ERROR: Can't open dynamic library: addons/fmod/libs/linux/libGodotFmod.linux.release.64.so. Error: libfmod.so.13: cannot open shared object file: No such file or directory
at: open_dynamic_library (drivers/unix/os_unix.cpp:412) - Condition "!p_library_handle" is true. Returned: ERR_CANT_OPEN
ERROR: No valid library handle, can't get symbol from GDNative object
at: get_symbol (modules/gdnative/gdnative.cpp:510) - No valid library handle, can't get symbol from GDNative object
ERROR: No nativescript_init in "res://addons/fmod/libs/linux/libGodotFmod.linux.release.64.so" found
at: init_library (modules/gdnative/nativescript/nativescript.cpp:1503) - No nativescript_init in "res://addons/fmod/libs/linux/libGodotFmod.linux.release.64.so" found
SCRIPT ERROR: Attempt to call function 'new' in base 'NativeScript' on a null instance.
at: _init (res://addons/fmod/Fmod.gdc:123) - Attempt to call function 'new' in base 'NativeScript' on a null instance.
ERROR: (Node not found: "CanvasLayer/ColorRect/GodotSplashScreen/AnimationPlayer" (relative to "/root/BumperScene").)
at: get_node (scene/main/node.cpp:1465) - Method failed. Returning: nullptr
ERROR: On Animation: 'Scene', couldn't resolve track: 'CanvasLayer/ColorRect/GodotSplashScreen/AnimationPlayer'.
at: _ensure_node_caches (scene/animation/animation_player.cpp:251) - Condition "!child" is true. Continuing.
ERROR: (Node not found: "CanvasLayer/ColorRect/GodotSplashScreen:visible" (relative to "/root/BumperScene").)
at: get_node (scene/main/node.cpp:1465) - Method failed. Returning: nullptr
ERROR: On Animation: 'Scene', couldn't resolve track: 'CanvasLayer/ColorRect/GodotSplashScreen:visible'.
at: _ensure_node_caches (scene/animation/animation_player.cpp:251) - Condition "!child" is true. Continuing.
WARNING: Octahedral compression cannot be used to compress a zero-length vector, please use normalized normal values or disable octahedral compression
at: norm_to_oct (servers/visual_server.cpp:346) - Octahedral compression cannot be used to compress a zero-length vector, please use normalized normal values or disable octahedral compression
WARNING: World already has an environment (Another WorldEnvironment?), overriding.
at: _notification (scene/3d/world_environment.cpp:38) - World already has an environment (Another WorldEnvironment?), overriding.
WARNING: World already has an environment (Another WorldEnvironment?), overriding.
at: _notification (scene/3d/world_environment.cpp:38) - World already has an environment (Another WorldEnvironment?), overriding.
SCRIPT ERROR: Invalid call. Nonexistent function 'set_software_format' in base 'Nil'.
at: set_software_format (res://addons/fmod/Fmod.gdc:156) - Invalid call. Nonexistent function 'set_software_format' in base 'Nil'.
SCRIPT ERROR: Invalid call. Nonexistent function 'init' in base 'Nil'.
at: init (res://addons/fmod/Fmod.gdc:143) - Invalid call. Nonexistent function 'init' in base 'Nil'.
SCRIPT ERROR: Invalid call. Nonexistent function 'load_bank' in base 'Nil'.
at: load_bank (res://addons/fmod/Fmod.gdc:259) - Invalid call. Nonexistent function 'load_bank' in base 'Nil'.
SCRIPT ERROR: Invalid call. Nonexistent function 'load_bank' in base 'Nil'.
at: load_bank (res://addons/fmod/Fmod.gdc:259) - Invalid call. Nonexistent function 'load_bank' in base 'Nil'.
SCRIPT ERROR: Invalid call. Nonexistent function 'load_bank' in base 'Nil'.
at: load_bank (res://addons/fmod/Fmod.gdc:259) - Invalid call. Nonexistent function 'load_bank' in base 'Nil'.
SCRIPT ERROR: Invalid call. Nonexistent function 'load_bank' in base 'Nil'.
at: load_bank (res://addons/fmod/Fmod.gdc:259) - Invalid call. Nonexistent function 'load_bank' in base 'Nil'.
SCRIPT ERROR: Invalid call. Nonexistent function 'load_bank' in base 'Nil'.
at: load_bank (res://addons/fmod/Fmod.gdc:259) - Invalid call. Nonexistent function 'load_bank' in base 'Nil'.
SCRIPT ERROR: Invalid call. Nonexistent function 'add_listener' in base 'Nil'.
at: add_listener (res://addons/fmod/Fmod.gdc:218) - Invalid call. Nonexistent function 'add_listener' in base 'Nil'.
SCRIPT ERROR: Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
at: create_event_instance (res://addons/fmod/Fmod.gdc:299) - Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
SCRIPT ERROR: Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
at: arnold_start_battle_vo_call (res://src/Main.gdc:23) - Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
SCRIPT ERROR: Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
at: create_event_instance (res://addons/fmod/Fmod.gdc:299) - Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
SCRIPT ERROR: Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
at: arnold_anticipate_vo_call (res://src/player/PlayerTemplate.gdc:266) - Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
WARNING: 'Navigation' node and 'Navigation.get_simple_path()' are deprecated and will be removed in a future version. Use 'NavigationServer.map_get_path()' instead.
at: get_simple_path (scene/3d/navigation.cpp:36) - This method has been deprecated and will be removed in the future.
SCRIPT ERROR: Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
at: create_event_instance (res://addons/fmod/Fmod.gdc:299) - Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
SCRIPT ERROR: Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
at: punch_audio_call (res://src/player/PlayerTemplate.gdc:247) - Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
SCRIPT ERROR: Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
at: create_event_instance (res://addons/fmod/Fmod.gdc:299) - Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
SCRIPT ERROR: Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
at: arnold_anticipate_vo_call (res://src/player/PlayerTemplate.gdc:266) - Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
SCRIPT ERROR: Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
at: create_event_instance (res://addons/fmod/Fmod.gdc:299) - Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
SCRIPT ERROR: Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
at: punch_audio_call (res://src/player/PlayerTemplate.gdc:247) - Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
SCRIPT ERROR: Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
at: create_event_instance (res://addons/fmod/Fmod.gdc:299) - Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
SCRIPT ERROR: Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
at: arnold_anticipate_vo_call (res://src/player/PlayerTemplate.gdc:266) - Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
SCRIPT ERROR: Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
at: create_event_instance (res://addons/fmod/Fmod.gdc:299) - Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
SCRIPT ERROR: Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
at: punch_audio_call (res://src/player/PlayerTemplate.gdc:247) - Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
SCRIPT ERROR: Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
at: create_event_instance (res://addons/fmod/Fmod.gdc:299) - Invalid call. Nonexistent function 'create_event_instance' in base 'Nil'.
SCRIPT ERROR: Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
at: sfx_call (res://src/issac/issac.gdc:212) - Invalid type in function 'start_event' in base 'Node (Fmod.gd)'. Cannot convert argument 1 from Nil to int.
SCRIPT ERROR: Invalid call. Nonexistent function 'free' in base 'Nil'.
at: _notification (res://addons/fmod/Fmod.gdc:134) - Invalid call. Nonexistent function 'free' in base 'Nil'.
ERROR: No valid library handle, can't terminate GDNative object
at: terminate (modules/gdnative/gdnative.cpp:417) - No valid library handle, can't terminate GDNative object

[loteque]

I replaced all the fmod-api modules in export directory with the modules from the plugin directory and fmod managed audio now works in the exported game. Modules copied over from addons into the export directory:
libfmod.so
libfmod.so.13
libfmodstidio.so
libfmodstidio.so.13