Activating snapshot to start a BPM 8.6 process

When I try to start the process in BPM on rest I get an error:

Result:
{
status: "error",
Data:
{
status:  "error",
exceptionType: "com.ibm.bpm.wle.api.CannotStartBPDWrongStateException",
errorNumber:  "CWTBG0586E",
errorMessage:  "CWTBG0586E: Cannot start BPD because the snapshot or BPD is in the wrong state.",
errorMessageParameters: null,
responses:  null,
errorData:  null
}

}

Then I do everything as described in the video:

https://www.youtube.com/watch?v=sD1_BHFHP4Y&list=PL7D328AAEB82FE141&index=9

But in my rest it does not work and the error is the same. The status snapshot remains active.

version BPM - 8.6.

I was able to solve my problem by iterating through the input parameters. To be able to start a task, I had to exclude from the request "snapshotId" and add "processAppId". After that, I received an answer of 200 and the task started. Version IBM Bussiness Process Manager Server 8.6.0.0 CF2018.03