Problem description: 1: It is caused by wrong software signature or multiple software signatures. 2. A certificate with low authority signed a program with high authority (this problem may occur when a certificate made by a general mobile phone forum has authority of 17 and a program with authority of 19 is signed).

Solution: 1: Re-sign with unsigned software before installation.

2. Certification authority required for the verification program, which should match the program issuing authority.

You can try to delete the signature from the software before signing it yourself. If not, it may be countersigned many times. Then download an unsigned signature and install it. The second reason is that there are still not enough certification bodies. You only need to sign a certificate with higher authority, or directly crack it and open the authority patch.