Merge pull request godotengine#90269 from KoBeWi/sir,_your_file_cannot_be_opened

Ignore `ERR_FILE_CANT_OPEN` error when loading

Author: akien-mga

core/variant/variant_parser.cpp

@@ -1027,7 +1027,7 @@ Error VariantParser::parse_value(Token &token, Variant &value, Stream *p_stream,
 				Error err = p_res_parser->ext_func(p_res_parser->userdata, p_stream, res, line, r_err_str);
 				if (err) {
 					// If the file is missing, the error can be ignored.
-					if (err != ERR_FILE_NOT_FOUND && err != ERR_CANT_OPEN) {
+					if (err != ERR_FILE_NOT_FOUND && err != ERR_CANT_OPEN && err != ERR_FILE_CANT_OPEN) {
 						return err;
 					}
 				}