No he hasn’t. See the previous post.
So with that decided, let’s critique Tyler Bramwell’s grammar. (I hope his books have better editing than his signs.)
✗ Jesus is risen.
Risen is a verb, and you can’t be a verb in the past tense. Here are some possibilities that he could have used that are grammatically correct.
✔ Jesus is rising.
✔ Jesus has risen.
✔ Jesus was not dead yet.
✔ Jesus is a figment of your imagination.