Hi, not sure what's going on...
My project used a now-deprecated add-on, and cannot be opened on the newest C3. However, when opening the project in 449-3, as suggested, it fails to open the project entirely, and displays this error code:
Error report information
Type: unhandled rejection
Reason: Error: expected string Ah.sh@https://editor.construct.net/r449-3/main.js:29:77329 Ah.Sz@https://editor.construct.net/r449-3/main.js:29:77394 t@https://editor.construct.net/r449-3/projectResources.js:1:538562 Do.m@https://editor.construct.net/r449-3/main.js:29:118762 zTt@https://editor.construct.net/r449-3/projectResources.js:1:510512 eZs@https://editor.construct.net/r449-3/projectResources.js:1:514811 Cv@https://editor.construct.net/r449-3/projectResources.js:1:527396 zTt@https://editor.construct.net/r449-3/projectResources.js:1:510528 eZs@https://editor.construct.net/r449-3/projectResources.js:1:514811 Cv@https://editor.construct.net/r449-3/projectResources.js:1:515457 Cv@https://editor.construct.net/r449-3/projectResources.js:1:503313 KYs/<@https://editor.construct.net/r449-3/projectResources.js:1:504190 Ad@https://editor.construct.net/r449-3/main.js:29:240151 Gd@https://editor.construct.net/r449-3/main.js:29:239944
Stack: Ah.sh@https://editor.construct.net/r449-3/main.js:29:77329 Ah.Sz@https://editor.construct.net/r449-3/main.js:29:77394 t@https://editor.construct.net/r449-3/projectResources.js:1:538562 Do.m@https://editor.construct.net/r449-3/main.js:29:118762 zTt@https://editor.construct.net/r449-3/projectResources.js:1:510512 eZs@https://editor.construct.net/r449-3/projectResources.js:1:514811 Cv@https://editor.construct.net/r449-3/projectResources.js:1:527396 zTt@https://editor.construct.net/r449-3/projectResources.js:1:510528 eZs@https://editor.construct.net/r449-3/projectResources.js:1:514811 Cv@https://editor.construct.net/r449-3/projectResources.js:1:515457 Cv@https://editor.construct.net/r449-3/projectResources.js:1:503313 KYs/<@https://editor.construct.net/r449-3/projectResources.js:1:504190 Ad@https://editor.construct.net/r449-3/main.js:29:240151 Gd@https://editor.construct.net/r449-3/main.js:29:239944
Construct version: r449.3
URL: editor.construct.net/r449-3
Date: Mon Nov 17 2025 16:15:43 GMT-0800 (Pacific Standard Time)
Uptime: 125.8 s
Platform information
Product: Construct 3 r449.3 (LTS)
Browser: Firefox 145.0
Browser engine: Gecko
Context: browser
Operating system: macOS 10.15
Device type: desktop
Device pixel ratio: 2
Logical CPU cores: 4
Approx. device memory: (unavailable)
User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:145.0) Gecko/20100101 Firefox/145.0
Language setting: en-US
WebGL information
Version string: WebGL 2.0
Numeric version: 2
Supports NPOT textures: yes
Supports GPU profiling: no
Vendor: Intel Inc.
Renderer: Intel(R) HD Graphics 400, or similar
Major performance caveat: no
Maximum texture size: 8192
Point size range: 1 to 255.875
Extensions: EXT_color_buffer_float, EXT_depth_clamp, EXT_float_blend, EXT_texture_compression_rgtc, EXT_texture_filter_anisotropic, OES_draw_buffers_indexed, OES_texture_float_linear, WEBGL_compressed_texture_s3tc, WEBGL_compressed_texture_s3tc_srgb, WEBGL_debug_renderer_info, WEBGL_debug_shaders, WEBGL_lose_context, WEBGL_provoking_vertex
Any and all help is appreciated; I've spent 2 years of my life on this project thus far...