https://developers.weixin.qq.com/doc/store/leagueheadsupplier/api/basic/api_getstableaccesstoken.html得到的token用在https://api.weixin.qq.com/channels/ec/order/delivery/send?access_token=ACCESS_TOKEN报错提示invalid credential, access_token is invalid or not latest, could get access_token by getStableAccessToken, more details at https://mmbizurl.cn/s/JtxxFh33r rid: 68fb1b3e-10120da4-5dc35c30

平台已上线 api 智能诊断功能,遇到服务端接口报错的问题,可通过rid一键智能诊断,详情可查看:https://developers.weixin.qq.com/doc/oplatform/developers/basic_func/aibot.html
所以上述问题,建议您这边可以先使用工具自助定位解决问题哈,如果还有问题可联系小助手再进一步定位看看。