Captive Portal Not Displaying

[Wandiga]

Hi Everyone. I have been experiencing an issue where Meraki Clients' captive portal stopped displaying. I have tried setting a new SSID splash but still not working on that network. Anyone here who have experienced such an setback and successfully resolved  it. Thank you.

[Malwina]

Hi! From the description it seems like the Splash page/Captive portal used to work but suddently stopped. Is this the correct understanding? 
Are all clients affected by this? 
What happens when you forget the SSID on an affected client and reattempt the connection? 

You may find this document useful: 
https://documentation.meraki.com/MR/MR_Splash_Page/Splash_Page_Traffic_Flow_and_Troubleshooting