This error " There was a problem saving your card, If the problem persists, contact Domo Support Team. Please assist on this.
It happens, unfortunately. Try refreshing your page and recreating the card.
If you have Beast Modes saved to the card that do not validate, this can cause problems, so make sure they are all good.
Thanks for your solution
I tried creating the beast mode again, validated and created the card, still I encounter the same error.
A BeastMode can "validate" but still be invalid for some reason the "validator" can't catch. That tends to be the reason I get that error.