Wechat config:invalid signature reported an error.
first excludes answers such as url, signature proofreading, whitelist, etc.
there is nothing wrong with the idSecret with the official test number and another uncertified official account. As soon as it is changed to the current official account, it will be reported to config:invalid signature, that all advanced permissions have been obtained during the current official account certification process.
ask the great god for advice.