Your mesh system needs a reset procedure which will solve various connectivity problems. The following micro blog post contains instructions for performing a factory reset on TP Link Deco which will help you restore your network.
🔧 What is Factory Reset TP Link Deco?
The factory Reset TP Link Deco process restores your Deco devices to default settings. The process deletes all stored settings...
Greek 
English
Arabic
French
Spanish
Portuguese
Deutsch
Turkish
Dutch
Italiano
Russian
Romaian
Portuguese (Brazil)