i just found a solution: right click on the background and chose "reset background"
Still, I do not understand the color changes that happened to the background. If someone knows, please let me know. TY!
Hi Christian,
The background in the thumbnail looked like it contained a link to it, possibly because of an embedded object that you added to your slide. Would you be willing to share a copy of your project file here or in private by opening a support case so we can take a look at the affected slide? We'll delete it when we're done troubleshooting!
