Having problems with setting up the sandbox for SCA after a sandbox refresh. SCA is 2018.2. There are two Extension Manager Activation records, which are pointing to the two production domain URLs. We are not permitted to edit them to point to the sandbox hosting domains due to a JSON error which appears on a whitescreen when we select the activation:

{
  "header": {
    "status": {
      "code": "ERROR"
    },
    "message": "Invalid Version: 18.2.06",
    "extra_data": {},
    "error_code": "TypeError"
  }
}

What's more we cannot create new Activations due to the same error. I understand for 2018.2 we need to use the 2018.2 developer tools, but at this point we cannot activate anything on the SB domain. Any tips?