I just wiped my cache partition, but that didn't help. Then I tried "Safe Mode" and immediately got the same "Couldn't Open Connection To Server" notification! I also have a Samsung Note 8 (I have seen a few earlier posts from people with the same phone). Here are 2 screenshots that I just took... one of them was while I was in Safe Mode! This is SO annoying!!
Yes, sorry I should have told you that! I actually did that first... about 3 days ago! It worked for about 2 hours, but then they came right back! Yesterday I installed the "Toast Source" app, and today it is showing a bunch of these notifications coming from my Visual Voicemail as well!
Didn't work for me 😥
Since update I have continually gotten this pop up message with no explanation as to why.
I had same identical problem. Popping up every 15 seconds after sending a text message. I tried safe mode, deleted cache partition, force stopped app, did everything in the world to stop it. Nothing worked until someone on another forum suggested this.
Settings > connections > more connection settings > reset network connections. This WILL solve your problem, but you'll have to re-enter your WiFi passwords and re sync all your Bluetooth connections. But it will fix it!
Big-Bad-Brad: THANKS A MILLION! That irritating message was popping up on my s7 for weeks, as often as 12 times while reading/writing a single message. Being ill 4 of those weeks multiplied the irritation exponentially. I researched the problem and unsuccessfully tried every solution mentioned. My SIM card was replaced at the AT&T store without improvement. I did not qualify for an upgrade. I was told it was an internal phone problem necessitating contacting Samsung. I decided to research the problem one more time and bingo, your solution popped up. Your simple solution saved my sanity and about a $1000. THANK YOU again!