I had the same issue:
For those that stumble upon this thread (which appears to be everyone who has upgraded to v.8.12.1) the link below is the missing information you need to finish fixing the problem:
https://support.reolink.com/hc/en-us/articles/21691244927897-How-to-Download-and-Install-DirectX-Jun2010-Redist-exe/
I had the same issue:
For those that stumble upon this thread (which appears to be everyone who has upgraded to v.8.12.1) the link below is the missing information you need to finish fixing the problem:
https://support.reolink.com/hc/en-us/articles/21691244927897-How-to-Download-and-Install-DirectX-Jun2010-Redist-exe/
