@alvaro123  Hello, 

Thank you for your valuable feedback.  

From cloud one of the Tapo C100 is the on the old firmware. Please ensure Tapo C100 firmware are up-to-date on APP: 

 https://www.tp-link.com/support/faq/2621/

Make sure camera connects to router directly, not throgh AP or extenders.

Can you help confirm details to help locate the issue: 

May I have a photo of the Error message on Tapo APP, does the error shows up when you try to watch live view ? What is the model & Android or IOS version your phone? 

Does all 3 cameras report the same Error message, can you share the Mac address of that camera to us via private message?

May I know the model of router,  Thank you in advance. 

Before I only updated the version, there was no difference in performance, all good. But now that I am with (low upload and high traffic) I have noticed all these problems, I can not even reproduce the motion detection on the farthest c100 camera  the captured video is frozen.

On the other hand, if I go back in version (until 2.3.33) everything is solved.

I don't use repeater mode, all wired. All APs are tplink from android 10 samsung galaxy the app connects from an AP to 2 other APs where the cameras are connected. 

Message "cannot be controlled locally" appeared only in farthest c100. Sometimes only when opening the app a message appeared above: unstable network had to be refreshed so that cameras appear.