Google fonts not found

[suyulin]

hi,
I run ./flutter-pi --release ~/flutter_gallery_assets got log

[flutter-pi] WARNING: display didn't provide valid physical dimensions.
The device-pixel ratio will default to 1.0, which may not be the fitting device-pixel ratio for your display.
===================================
display mode:
resolution: 1024 x 600
refresh rate: 60Hz
physical size: 0mm x 0mm
flutter device pixel ratio: 1.000000
===================================
EGL information:
version: 1.4
vendor: "Mesa Project"
client extensions: "EGL_EXT_device_base EGL_EXT_device_enumeration EGL_EXT_device_query EGL_EXT_platform_base EGL_KHR_client_get_all_proc_addresses EGL_EXT_client_extensions EGL_KHR_debug EGL_EXT_platform_wayland EGL_EXT_platform_x11 EGL_MESA_platform_gbm EGL_MESA_platform_surfaceless EGL_EXT_platform_device"
display extensions: "EGL_ANDROID_blob_cache EGL_ANDROID_native_fence_sync EGL_EXT_buffer_age EGL_EXT_image_dma_buf_import EGL_EXT_image_dma_buf_import_modifiers EGL_KHR_cl_event2 EGL_KHR_config_attribs EGL_KHR_create_context EGL_KHR_create_context_no_error EGL_KHR_fence_sync EGL_KHR_get_all_proc_addresses EGL_KHR_gl_colorspace EGL_KHR_gl_renderbuffer_image EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_3D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_image EGL_KHR_image_base EGL_KHR_image_pixmap EGL_KHR_no_config_context EGL_KHR_reusable_sync EGL_KHR_surfaceless_context EGL_EXT_pixel_format_float EGL_KHR_wait_sync EGL_MESA_configless_context EGL_MESA_drm_image EGL_MESA_image_dma_buf_export EGL_MESA_query_driver EGL_WL_bind_wayland_display "
===================================
OpenGL ES information:
version: "OpenGL ES 2.0 Mesa 19.3.2"
shading language version: "OpenGL ES GLSL ES 1.0.16"
vendor: "Broadcom"
renderer: "VC4 V3D 2.1"
extensions: "GL_EXT_blend_minmax GL_EXT_multi_draw_arrays GL_EXT_texture_format_BGRA8888 GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth24 GL_OES_element_index_uint GL_OES_fbo_render_mipmap GL_OES_mapbuffer GL_OES_rgb8_rgba8 GL_OES_stencil8 GL_OES_texture_3D GL_OES_texture_npot GL_OES_vertex_half_float GL_OES_EGL_image GL_OES_depth_texture GL_AMD_performance_monitor GL_OES_packed_depth_stencil GL_OES_get_program_binary GL_APPLE_texture_max_level GL_EXT_discard_framebuffer GL_EXT_read_format_bgra GL_EXT_frag_depth GL_NV_fbo_color_attachments GL_OES_EGL_image_external GL_OES_EGL_sync GL_OES_vertex_array_object GL_EXT_occlusion_query_boolean GL_EXT_unpack_subimage GL_NV_draw_buffers GL_NV_read_buffer GL_NV_read_depth GL_NV_read_depth_stencil GL_NV_read_stencil GL_EXT_draw_buffers GL_EXT_map_buffer_range GL_KHR_debug GL_KHR_texture_compression_astc_ldr GL_OES_required_internalformat GL_OES_surfaceless_context GL_EXT_separate_shader_objects GL_EXT_compressed_ETC1_RGB8_sub_texture GL_EXT_draw_elements_base_vertex GL_EXT_texture_border_clamp GL_KHR_context_flush_control GL_OES_draw_elements_base_vertex GL_OES_texture_border_clamp GL_KHR_no_error GL_KHR_texture_compression_astc_sliced_3d GL_KHR_parallel_shader_compile GL_MESA_tile_raster_order "
===================================
detected VideoCore IV as underlying graphics chip, and VC4 as the driver.
Reporting modified GL_EXTENSIONS string that doesn't contain non-working extensions.
flutter: Error loading AssetManifest.json, e: Unable to load asset: AssetManifest.json
[ERROR:engine/src/flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: Unable to load asset: packages/flutter_localized_locales/data/en_US.json
#0 PlatformAssetBundle.load (package:flutter/src/services/asset_bundle.dart:225)

#1 AssetBundle.loadString (package:flutter/src/services/asset_bundle.dart:68) #2 LocaleNamesLocalizationsDelegate._loadJSON.parser (package:flutter_localized_locales/flutter_localized_locales.dart:69)

flutter: Error: google_fonts was unable to load font Montserrat-Bold because the following exception occured:
Exception: GoogleFonts.config.allowRuntimeFetching is false but font Montserrat-Bold was not found in the application assets. Ensure Montserrat-Bold.otf exists in a folder that is included in your pubspec's assets.
flutter: Error: google_fonts was unable to load font Oswald-SemiBold because the following exception occured:
Exception: GoogleFonts.config.allowRuntimeFetching is false but font Oswald-SemiBold was not found in the application assets. Ensure Oswald-SemiBold.otf exists in a folder that is included in your pubspec's assets.
flutter: Error: google_fonts was unable to load font Oswald-Medium because the following exception occured:
Exception: GoogleFonts.config.allowRuntimeFetching is false but font Oswald-Medium was not found in the application assets. Ensure Oswald-Medium.otf exists in a folder that is included in your pubspec's assets.
flutter: Error: google_fonts was unable to load font Montserrat-Medium because the following exception occured:
Exception: GoogleFonts.config.allowRuntimeFetching is false but font Montserrat-Medium was not found in the application assets. Ensure Montserrat-Medium.otf exists in a folder that is included in your pubspec's assets.
flutter: Error: google_fonts was unable to load font Montserrat-Regular because the following exception occured:
Exception: GoogleFonts.config.allowRuntimeFetching is false but font Montserrat-Regular was not found in the application assets. Ensure Montserrat-Regular.otf exists in a folder that is included in your pubspec's assets.
flutter: Error: google_fonts was unable to load font Montserrat-SemiBold because the following exception occured:
Exception: GoogleFonts.config.allowRuntimeFetching is false but font Montserrat-SemiBold was not found in the application assets. Ensure Montserrat-SemiBold.otf exists in a folder that is included in your pubspec's assets.