ToC books not opening in Chrome

[francineOracleHSGBU]

I'm using RoboHelp 19 Classic. The TOC books were working correctly until 2 days ago. I'm using 

Google Chrome is up to date

Version 77.0.3865.90 (Official Build) (64-bit)

[Jeff_Coatsworth]

I've branched you off because that was a really old discussion. Are you producing WebHelp with your RH2019 Classic version or HTML5 help? Are you patched up with Update 9?

[francineOracleHSGBU]

WebHelp with RH2019 Classic. Installed Update 9. Re-ran the help. Now help is not opening from application at all. When I click the Help button, it tries, but nothing happens. This is what was happening before the update with two of the books in the TOC. I would click it and you would see that it tried to open, but didn't.

[Peter Grainge]

Does the help work correctly if you open it independently of the application?

[francineOracleHSGBU]

Yes

[Peter Grainge]

The the problem has to be with either what has been uploaded to the server / put in the app folders by the developers or the way they are calling the help.