Large number of ‘Snapshot request handler provided empty image buffer’ - messages in the log.
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# Bug Report

### Describe the Bug

I’m constantly receiving loads of “Snapshot request handler provided  empty image buffer " and the Home App did not always show an image 

### To Reproduce

Nothing really, the plug-in was installed and it seems to get images - but I can see loads of this type of ‘snapshot request handler ‘ messages in the log.

### Expected behavior

I expected it would be more tolerant, and obtain image updates without issue.


### Screenshots/Logs

I have a screenshot, but can’t seem to see how to post it here?

### Additional context.

### Homebridge Ring Config

It’s no longer installed.

### Environment
 - OS: QNAP NAS
 - Node.js:  v14.15.3
 - NPM: v6.14.9
 - homebridge-ring: v9.15.4
 - homebridge: v1.3.3
