My WeChat public platform cannot connect to third parties, and the error code is 48004

There is also another problem found on the WeChat public platform: as shown below

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My access_token upper limit is displayed as 0. Previously, my subscription account was converted into a service account.

I would like to ask the master, how to solve these two problems?

I don’t know how to write code, and I have also consulted some technical documents, but the problem has not been solved. Please give me some advice

Thank you!