It shows License not activated notification appears in Revolution Sliders. See the link below. When clicking update it ask to buy license. I don’t have any issue with cache by caching plugins as I didn’t installed any yet and also cleared the purged CDN and updated htaccess and permalink.
Several other plugins like Envira Gallery (every click in WordPress makes some red line and show an error message that I have shared in the link above). There are many other plugins that I shows need to update but when try to update it shows error or unable to update or need license so if those doesn’t need any update then your NEXT UPDATED VERSION of THEME should force those to stop looking for license key or update.